Mahito Ito never forgot the promise he made as a child.

Years ago, after the death of his mother, a grieving boy met a girl in a quiet park. When he had nowhere to turn, she offered him comfort—and made a promise that stayed with him long after they parted.

Years later, Mahito has spent countless hours rebuilding himself. Determined to see her again, he pushes his body and mind to the limit until he finally earns admission to Tokyo Metropolitan Izumi High School—the same school his childhood friend, Yuna Hanaoka, now attends.

But the reunion he dreamed about may never happen.

As Mahito struggles through awkward first impressions, new friendships, volleyball practice, and the expectations placed on him as the heir to a powerful company, one question keeps returning to him:

Will Yuna even remember the promise they made?

A slow-burn romantic comedy about promises, memory, and the courage it takes to face someone who changed your life.