Chapter 21

"Senpai's mail!!" (センパイ、ゴチっス!!) is the twenty-first chapter of the Don't Toy With Me, Miss Nagatoro manga series.

Summary
The day before summer break began, Senpai was walking home alone until he is reached by Nagatoro, who slipped his bottle of water from his hands and eagerly drank from it. After he scolded her for not asking permission, Nagatoro stated that she knew he would not deny a sip of water from "his poor thirsty kouhai", which he proved it was right as he stated he didn't mind it.

Then Senpai began to wonder with some melancholy if he would have had to deal with Nagatoro even during the summer break and, as in response she asked to exchange mail contacts (Japanese variant for phone numbers). After he accepted Nagatoro was overjoyed and when he told her there was nothing special in having his line ID, she sweeten up and tenderly saying that she believed otherwise.

Not wanting to get too emotional, Nagatoro added that from that point on she would have sent him a cat-sticker every time she "sensed" he was thinking about something lewd. After they parted ways, Senpai prepared to drink from his water bottle but hesitated remembering that Nagatoro has drank from it too and than it would have been an indirect kiss.

In that moment he received a cat-sticker from Nagatoro and, turning, found that the girl was looking at him. Smiling, she jokingly called him a "pervert".

Characters

 * Hayase Nagatoro
 * Senpai

Trivia

 * This chapter marked the beginning of the series first narrative arc, the "Summer Break Arc" which last until Chapter 26.
 * Chronologically the story of Bonus 2 is placed after this chapter, since this moment is when Senpai and Nagatoro exchanged their mail address.
 * The game Senpai was planning to play during summer break was the fictional "Last Quest" a reference at both ' and '.
 * Senpai's mail contact is "kjnokotakenoko", referencing both the Kinoko no yama and the Takenoko no sato, two kind of snacks that in Japan originate a fervent argument regarding which is the better one.