Itsuki Irie, a lifelong loser, freeter, and virgin, lived a life burdened with debt, shuttling between his rundown apartment and a convenience store.

Days were a hellish struggle to repay his debt.

One day, he was almost run over by a truck.

At that moment, Itsuki Irie remembered the one and only regret of his life.

It was about a girl named Kotori Shiina, to whom he had made his first confession in middle school, only to be cruelly rejected.

When he woke up, he had time-leaped back to his middle school days.

Before the time-leaped Itsuki Irie stood Kotori Shiina, the most beautiful girl in school.

Just as before, Itsuki Irie was rejected by Kotori Shiina.

Itsuki Irie remembered: this confession would lead to her being bullied and eventually committing suicide.

Itsuki Irie begins to take action to change Kotori Shiina's suicidal future.

This story will be told from the perspective of the heroine, Kotori Shiina.

You might enjoy this more if you read it by comparing it to the typical narrative: "I returned to school, changed the suicidal past of the most beautiful girl, and upon returning to the future, I was married to her."