True Love Story

After his mother's death Morisaki Yuuta and his older sister Ruri move into the city, both attending Tachikuka Koutou high school.

In a school corridor, Yuuta bumps into the cute yet slightly klutzy Kusunose Hina, a member of the tennis club.

Hina remembers their shared past.

Slowly Yuuta starts to remember the childhood promise he made to the girl with whom he used to play when his mother was still alive.