5 boys and girls full-shuffled! 5-way love pentagon comedy! At clubhouse room 401, there gathers "anything goes" members of the culture study society. Pro-wrestling otaku Taichi Yaegashi, mysterious beauty Iori Nagase, cool Himeko Inaba, the clown Yoshifumi Aoki and fancy-loving Yui Kiriyama found the noisy but calm days suddenly come to a halt. The personality switched among the members--. The unnatural days of changinging into "someone" by getting back to "themselves" by becoming "someone else" has started!

Yamaboshi Academy’s Student Cultural Society consists of five weirdos (Himeko, Iori, Yui, Aoki, and Taichi) who just don’t fit in anywhere else. While they seem as close as friends can be, when they mysteriously start swapping bodies with one another, their bond is put to the test. Now the five friends must figure out not only why this is happening to them, but come to terms with each other’s innermost secrets, fears, and hidden crushes. Can they possibly stay friends while retaining their sanity? (Source: Seven Seas Entertainment)

Kokoro Connect: On Air is a 1-volume manga adaptation of the series's anime, covering story plot up to Kako Random.

"If you could redo your high school life one more time, what would you do?" A mysterious power, "Syndrome," which is contracted simply by enrolling into Wazuki High School. Due to that power, Yokosuka Hiroto had his time forcefully rewound three years back. Without knowing the circumstances, nor who's ability was responsible, what he was left with were merely faint memories. In this situation the goal Hiroto set for himself was: To make these three blank years into the best high school experience!? (Source: Amazon)

19 short stories by 19 different writers.

A 27-year-old man is told not to worry by the 15-year-old girl that he finds out he's being married to. Later, the aforementioned 27-year-old man that was told not to worry by the 15-year-old girl that he found out he's being married to - and is now living with - finds a new girl, coincidentally also 15-years-old, declaring that she wants to live with the initial 15-year-old girl.

Shouta Majima is a high schooler who loves the night, and is often said to be too serious. He lives in a small town in the countryside, and spends each day doing things that are as average as his height. But at night, he felt he didn't need to be that way. Even so, he decided to sneak into school in the middle of the night one night, and found his classmate Akari Tsukimori, who was usually always sleeping, having a "night class". It was then that his life began to change. According to her, studying can change everything. "Studying opens the door to the world. It makes the impossible possible. It can even make it so you can get out of this town. And of course, I'll easily get 100 on tomorrow's test." Thus begins a new age love story where these two take on the world by night! Source: KADOKAWA

An anthology of 20 short stories with the theme "15 cm between you and me" written by 20 different authors.