Don't Toy With Me, Miss Nagatoro x Magical Sempai

"Don't Toy With Me, Miss Nagatoro x Magical Sempai" (イジらないで、長瀞さんx手品先輩) is a crossover chapter between the Don't Toy With Me, Miss Nagatoro and Magical Sempai manga series.

Summary
While at the sea on a rowboat, Nagatoro urged Senpai in going faster and getting more fired up, unfortunately Magical Sempai and her Assistant do the exact same thing, resulting in their boat collapsing, sank and both couples washing on a small desert island. After getting acquainted the two energic girls decided to work together in order to escape the island, much to the boys annoyance.

First, Nagatoro suggested Magical Sempai to use her magic to make them escape, causing the latter to get excited about people asking her to do magic and, having found a wooden crate among some garbage washed up with them, she improvised a magic trick in which she hid under it telling she was going to teleport, however due to her stage fright she messed up her trick ending up stuck inside the box in an embarrassing position and leading to Assistant saving her.

While trying to figure another way out of the island, due to the hot environment the bikini-clad girls started to get sweaty, leading the jealous Nagatoro to harass Senpai for staring at Magical Sempai's boobs or her body, despite he denied having stared at neither of them. After a while, Nagatoro and Magical Sempai decided to gather up all the seagulls on the island and using them to fly to the mainland, however their attempt to catch them eventually go arwy resulting in the birds taking away both girls' bikini tops, leaving their breasts exposed right in front of their respective love interests.

Right at that moment a couple of fishermen saw the seagulls going crazy on the island, leading them to noticing the four and rescue them. Despite making it back to the beach safely the situation got a little awkward for the two boys.

Characters

 * Hayase Nagatoro
 * Senpai
 * Magical Sempai
 * Assistant

Trivia

 * Magical Sempai is under the same publishing company as Nagatoro-san, Kodansha. Nagatoro-san appears in the online Magazine Pocket while Magical Sempai appears in the printed Weekly Young Magazine.
 * There are two versions of the twelfth page of the crossover, one for Magazine Pocket featuring Nagatoro having her top removed by a seagull, and the other for Weekly Young Magazine featuring Magical Sempai having her top removed by a seagull. The same happens to the other girl in both pages, though the focus is different between versions. The print version is more risqué as one of Magical Sempai's areolae can be seen, unlike the alternate page with Nagatoro, as this never happened in Nagatoro's manga, while it happened a few other times with Magical Sempai.
 * "Senpai" and "Sempai" are both valid renderings of 先輩, with "Senpai" more like how it's spelled on paper while "Sempai" is more like how it sounds when spoken.
 * A disclaimer states that the story is fictional, which may mean it's not supposed to be taken seriously as "canon" for either manga series.
 * The crossover was reprinted in Illust Collection 2 with both versions of page 12.