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.

The ceiling collapsed and a girl fell through from the second floor!? Sousuke lives in a rundown apartment building where his only consolation is that the landlord is a beautiful woman and the girl who lives above him is cute. One day though, the ceiling above him creaks and... Bang! In from the second floor, directly above him, the cute girl comes crashing down on him…!? In an erotic encounter that can only be classified as a miracle, hearts and bodies are connected by chance. Then for some reason, he starts to live with both of these beautiful women!? Under this one roof, just what exactly will become of this crowded love triangle...!? (Source: Honey's Anime)

Suga Kimio finds himself hiding in the girls locker room, unable to move or escape the situation as the girls in his school crowd in. Although he originally had no ulterior motives, he found himself panicking as he heard the girls coming in and hid in a locker. Komine Nozomi, one of the shy girls in his class finds him, but surprisingly covers for him. Perplexed but glad, Kimio goes home. Later that night, he gets a text from Nozomi who happens to live across the way on the same floor of the complex they both live in. She blackmails him into agreeing to show each other's bodies when she texts him. Kimio has to abide by Nozomi's insane demands or risk ruining his school life so they both start their little peep show through each other's windows... (Source: MangaHelpers)