An unemployed man learns that his ex-girlfriend was murdered. He suddenly finds himself travelling through time to his middle school years and has chance to change the future and save the girl. He aims to rise to the top of the most brutal delinquent gang.
Aoi Nishimori and Shūsei Kugayama are in love and they begin to live together secretly. Suddenly, Shūsei's cousin, Reon Kugayama, comes to them. Their secret is discovered by Reon. Now, Aoi, Shūsei, and Reon begin to live together.
Jin Minase, a dedicated student, finds his routine disrupted when he repeatedly encounters Hirukawa, a classmate from a rough neighborhood. Their unexpected interactions make Jin question his own life choices.
