Ashita, Hadashi de Koi.

On graduation day, the narrator recalls a high school experience marked by poor academic performance and the loss of his aspirations. His former girlfriend, now a successful musician, has gone missing. He is then transported back to the start of his high school years, during the entrance ceremony. Confused by the change, he considers how to approach this second chance. He is determined not just to prevent her disappearance, but to achieve a balanced relationship with her. He resolves to make the most of the next three years.