“What the hell are you doing, me?”
Already half of his high school life is over and none of his hopes and dreams have been fulfilled yet…
This is how Yuuhi Nagi, who has no friends in his classes, has been living his uneventful empty life – until he got dragged into this unexpected crisis!
This is how the lives of the four people who are most likely to repeat a year, and the person who will help them succeed, are connected.
This is where this bittersweet coming of age story begins!!

Kaizaki Arata is a 27-year-old, out-of-work man who has failed at each and every job interview he has had after quitting his last company where he only lasted three months. His life changes after he meets Yoake Ryou of the ReLife Research Institute, who offers him a drug that can change his appearance to that of a 17-years-old again. Taking the drug, he becomes a subject in a one-year experiment in which he begins his life as a high school student again.

Note: Nominated for the 39th Annual Kodansha Manga Awards in 2015.