Sana Sunomiya/Biography

Early life
Sana was born on June 19 in, , into the Sunomiya family; an only child, she has a younger cousin, Hana, who looks almost identical to her. She hail from an influential and wealthy background; however she was raised mostly by her grandparents due to her parents busy jobs. Her grandfather, the owner of a, taught said discipline to her since an early age. She grew up in an uptown luxury house close to the city's shrine, where it's implied she serves as a.

After reaching teenhood she began to attend Kazehaya High School and became the President of the art club. An extremely passionate and talented painter and artistic performer, the President was selected for awards in many different contests, once even reaching top ranking in an exhibition that included university students.

During her second year, an introverted but talented boy named Naoto Hachiouji joined the club, developing a huge crush on her. The President began to harbor a great respect for his skills and to some extent reciprocated his feelings. However, on the last day of the school's Cultural Festival, where the main attraction was a fully nude self-portrait of hers from the back, and in which the boy helped her organize their club's display resulting in a huge success, she thanked him for having allowed her to have some good memories before having to go to cram school like all the second years, thus becoming unable to join club activities anymore and leaving the art club and its activities to him.

Since then the President, and all of the other members, left the club and, albeit she kept managing it's bureaucracy and logistics, the boy was left as the only club member.

She then began to study hard aiming for an Art University after she graduate, however she managed to find enough time to plan the annual field trip, leading her own group which Senpai joined.

Culture Festival
After hearing some rumors from the student council that her club has become a hangout for "a bunch of good-for-nothings", one afternoon she went back to the club room with a stern expression on her face. At first the girl informed Senpai that she would help the art club display by submitting also one of her paintings, then she scolded him for said rumors, telling him was disappointed for him inviting people and being rowdy and reminding him that the art club was not a playground. The President, also saw Senpai's painting of Nekotoro and criticized it, saying that wasn't the manga research club, then informing him that she spoke with the student council and was thinking about disbanding the club, leaving him unable to reply.

Then Nagatoro came out of the prep room, where she was hidden by the boy alongside her friends, and faced the girl herself accusing her of being selfish and unreasonable as she was the one who abandoned the club only to suddenly walk back in it talking about disbandment. The President dismissed said accusation, stating that if the only active club member lacked motivation there were no reason for the club to continue, thus angering Nagatoro who finally lashed out making her feelings for Senpai transpiring and yelling that even by himself he had always worked really damn hard. Hearing this, the President said she understood what Nagatoro was trying to tell her, but added that she could not ignore the student council's warnings. Nagatoro thus asked her what was to be done. She then suggested that Senpai hold his own art display independently from the club, and if he defeated hers in the school's popularity contest she would rescind the club's disbandment. Although Senpai was not very confident about it, Nagatoro immediately accepted the challenge in his stead.

The following day, the President took possession of the art club in order to work on her painting, leaving him the prep room. While the boy was doing a still life, she approached him, wearing just a towel since she was doing another nude self-portrait, and told him it was a technically good but boring piece. She told him that the most important element in making art was "love", and thus his painting must reflect that. Nagatoro entered the room to visit Senpai and, seeing the President half-naked with him, ran away deeply saddened, since earlier she had angrily told him to draw the President instead after he was unsatisfied by her posing in costumes. Seemingly understanding the girl's feelings, the President ordered Senpai to chase her and not let her slip away, saying that "chasing after something" was also what art was about; which he immediately did, despite feeling out of his depth with her grand statements.

A few days later, as members of the art club, Senpai and the President were both asked to help decorate the panels for the entrance of the Cultural Festival. Then as they walked back together after having finished, they talked about how their respective submissions were coming along and the President said she won't hold back. Then, passing by the corridor, they heard the voices of Nagatoro and her friends inside the art room and the President told him he mustn't eavesdrop on them and that regardless what they were planning, the match was between the two of them, despite Senpai believing it didn't seem like that anymore. Right at that moment, a group of girls looked inside the room, and upon seeing Nagatoro and her friends, started to mumble about "Toro-Cat" and some related straps. This puzzled Senpai, who saw a strap on the President's bag and asked her about it, prompting the latter to tell him it had recently become very popular in her class, and they both realized that it was actually a caricature of Nagatoro in her cat costume.

The day of the Cultural Festival, the President had no problem in talking smoothly in front of the cameras when the school journal interviewed her, inviting everyone to visit her exhibition. As the hours passed, lots more people went to see the President's new nude self-portrait, although Senpai's exhibition also drew a decent amount of viewers after Nagatoro and her friends began gathering people using Toro-Cat's popularity. Later on, to everyone's surprise, the President's display was shut down by the school's public morals committee as they had given her permission to do nude art depending on what they would see on the actual day, and ultimately deemed it "too immoral for a school". While she was being escorted away by the committee head in order to explain herself to the student council, Nagatoro and Gamo-chan forced her to admit they had won the match as she lost due to disqualification. Thus, after exulting, in order to further humiliate her, the girls forced the President to wear a skimpy bunny suit and sell their straps all over the school. Senpai protested, but the President agreed since she had earlier imposed a penalty on them if they were to lose. After getting a sold out, the girls allowed her to go and she went back to Senpai's exposition, where the boy suggested her to take off the bunny costume before risking more trouble with the public morals committee. Nagatoro entered right at the moment in which the shameless girl was about to strip in front of Senpai, preventing her from doing it and prompting her to lie that she was just joking. Then looking at Senpai's paintings of Nagatoro, the President told him that there was "love" in them, thus making both Nagatoro and Senpai blush.

Sending Nagatoro and Senpai on a zoo date
A few days after the end of the Cultural Festival, seeing Senpai seemingly having a problem getting in the mood to do a good painting, the President gave him two tickets to the town zoo so he could sketch while in the outdoors. She ordered him to try and invite the one she called the "cat girl" so she could join him in the activity, reasoning that if an outsider like her would keep barging into the club, she should at least draw something every now and then. She inadvertently gave Nagatoro, who overheard part of their conversation, some inappropriate ideas due to a certain ambiguity of words, as the girl misunderstood the instruction to "sketch" with her as to "ejaculate" with her.

During said activity, Senpai ended up remembering the President's philosophy about love being the secret to make a good picture in two occasions, when Nagatoro asked about it and after she made a well drawn and realistic sketch of him.

Coming of winter
During the school-wide marathon, the President ran wearing her bunny suit since cosplaying was allowed and at some point overtook Senpai, Nagatoro, Gamo-chan, Yoshi and Sakura, prompting the girls to get motivated into "beating the hare". During the last mile, likely expecting some kind of challenge from the clique, she talked to herself out loud saying she was disappointed from the "cat girls" not having raced her, however, right at that moment the whole gang caught up to her, transporting Senpai in a formation similar to a human cart. The girl still managed to be faster than the group, until Gamo-chan told Yoshi to run in front of them using her almost superhuman speed to act as a windbreak and increasing their speed, managing to narrowly beat the President, albeit getting disqualified by the teachers because of their formation.

First name arc
After Senpai caught a flu, Nagatoro "wrung his address out of the President" in order to visit him.

Christmas
On Christmas Eve, the President decided to enjoy the club room one last time before the year ended by taking all of her clothes off and "feeling its atmosphere on her skin" by walking through it fully naked. After entering the room, however, she met Nagatoro and Senpai, interrupting them while they were trying to find the right moment to exchange their respective Christmas gifts; after explaining nonchalantly why she was in the buff, the President was called a "horny bunny" by Nagatoro, then she asked if they were on a tryst, causing both her pupil and the younger girl to blush and run off, storming out of the room.

The President's strongly against the school protocol deed apparently goes unnoticed by the strict professor Yamaguchi and she seemingly performed it so often to unknowingly creating the legend of the "Ghost of the Pale Woman" appearing long after closing time in the dead silence of the hallways.

While streaking throughout the school hallways late that night, she ran into Rabi-chan and her boyfriend, who were leaving the school in order to go on their Christmas Eve's date while talking about a rumor of the "Ghost of the Pale Woman", in fact generated by her activities. Thinking that the legend was true, and mistaking her for a ghost, the couple quickly ran off leaving her perplexed and dumbfounded as she didn't realize the reason of their sudden panic.

University
She passed the entrance exam of on her first try and was thus complimented by Senpai. However the girl explained that this was merely the first step, informing him that it would be his turn next and asking him if he had decided his own path, to which the boy replied that he wanted to enter a fine art university too. This prompted the President to smile gleefully, saying he didn't expect such a clear and direct answer from him. She further asked if it was because of the "Cat-Girl" influence, which Senpai promptly denied.

Judo Tournament
Some time later, Gamo-chan and Yoshi informed her that Senpai have been receiving training in order to compete in the upcoming judo tournament, so she called him to the school's judo hall and decided to give him a hand. As they got into position, however, the boy noticed that she wasn't wearing anything underneath her which distracted Senpai as the girl slammed him to the ground. Meanwhile, having misunderstood in a sexual way her friends' playful description about what was happening, Nagatoro reached them, finding Senpai pinned to the floor under the girl's massive breasts. Afterward, she offered to train Senpai personally, yet he declined, informing her that Nagatoro was already teaching him, much to the latter's joy.

First date arc
Some time later, she graduated and began to attend university, thus leading Senpai to take over the art club while her younger cousin joined it after beginning high school.

At the start of the new school year, she went to pick her cousin up because it was getting dark; thus she got to her former school riding a motorbike. She met Senpai and her cousin as they left the building. She greeted the boy (who still addressed her as "President") and sensed that something was troubling him; thus she asked him if he was alright. Due to Senpai's reluctance to explain why, her cousin quickly whispered to her that the boy was a little sad due to Nagatoro having left their "love nest" due to joining the judo club, and that she had suggested that he ask Nagatoro out on a date. Despite Senpai's embarrassment at her learning about it, she said she understood and told him to follow his heart, right before driving away with her cousin.

Few days later, after Senpai asked Nagatoro out on a date at the aquarium, due to her cousin having overheard that Gamo-chan and Yoshi would have tried get in the way of it, she followed both the pair of girls and the couple - together with her cousin - in order to "protect Senpai's romance". The Sunomiya cousins tailed Gamo-chan and Yoshi in order to prevent them from doing anything during Senpai and Nagatoro's date; however all of them lost track of them lost track of the couple after they entered the aquarium and, when they finally found them again, Senpai noticed their presence and run away with Nagatoro. Gamo-chan and Yoshi tried to follow them but are stopped by the Sunomiya cousins; however they managed to escape them, so the two cousins eventually found both girls at the seaside and chase them accidentally storming on the scene just as Nagatoro and Senpai were about to hug, thus ruining the moment. The following morning, the former President and her cousin has both a videocall with Senpai and suggested him to treat making his bento like a food battle with Nagatoro, but the boy refused.