After moving into his new apartment, art school student Tatsuhiko Kido discovers a crack in his wall. When he peeks inside, he makes eye contact with his neighbor, Emiru Ikuno, as she masturbates. He rushes next door to clear the misunderstanding and inform her of the crack, but accidentally trips and falls over her in the process. To make matters even worse, Emiru now has photographic evidence that would plainly depict Kido as a sexual offender. Kido then learns that Emiru has a voyeurism fetish, and is blackmailed into leaving the crack as is. Unfortunately for Kido, it doesn't stop here! Emiru is also attending the same art school that he is, and he will be seeing her far more than he would like to. Emiru and Kido are set to embark on a unique friendship with wildly erotic potential.

Bundled with the 13th limited-edition volume of the manga.

Beginning her academic journey as a first grader, Shiori comes face to face with the aspect of school she has heard alarming rumors about—homework! However, her worries quickly turn into excitement as the Asahigaoka girls agree to work together to complete their assignments at Komari and Natsumi Koshigaya's house. Their plan appears to be successful until an all-too-familiar feeling of procrastination creates a rowdy distraction for Natsumi. On another day, Natsumi asks her teacher Kazuho Miyauchi if she can form and lead a new badminton school club. While the lack of funding and equipment proves to be a major setback, it does not stop Natsumi and the other girls from asking the candy store owner Kaede Kagayama for some help. During their spontaneous badminton practice, a minor accident leads Kaede to reminisce about a memorable day when she babysat Renge Miyauchi.

While spending a summer day at the department store, Suguru Koshigaya wins the lottery’s grand prize—four tickets to Okinawa! Filled with awe and excitement, the girls of Asahigaoka do various things to prepare for the trip. From practicing how to ride on an airplane to buying travel essentials at the convenience store, they do everything beforehand so they can enjoy their time in Okinawa to the fullest extent. A departure from the familiar scenery of Asahigaoka is a new experience for Renge Miyauchi, but that does not stop her from pondering how her perspective of the world may change. As the day of the trip draws near, a promise is made.