You get the chance to fix everything you destroyed in high school, except the person you need to apologize to most doesn't remember any of it. Haibara moves through his second chance with the weight of seven years of regret, trying to be better while everyone else is just trying to survive freshman year. The romance isn't a reward for getting it right this time, it's the proof that some mistakes can't be unmade, only understood.

Natsuki Haibara is a socially anxious college student who keeps looking back on his high school years with regret. Back then he was overweight and lonely, and every attempt to become outgoing fell flat. One evening he prays for a second chance, and the next morning he finds himself seven years in the past, one month before starting high school. He uses that month to get into shape, and throughout his second try he draws on workout routines, online guides and a childhood friend. On the first day he makes a good impression and befriends familiar faces, including Hikari Hoshimiya, the girl he had a crush on in high school. His feelings for her have not changed, and dating her becomes his new goal. Along the way he returns to basketball and takes a part-time job at a local cafe, but new friendships bring challenges he never faced before. The result is a romantic slice-of-life story about getting a second shot at adolescence.