Hikada Sana returns to his home town after living away in Tokyo for five years. Although some time has passed the town has not changed much. On a detour to his apartment, he notices that a shrine maiden is watching him as he visits the shrine. The following day at school, Sana is surprised to find out that this girl is actually Yatsushiro Nanaka, a good childhood friend, whom he gave a bracelet before he left so many years ago. And even to this day, she is still wearing it...