One: Kagayaku Kisetsu e — Episode 1

Orihara Kouhei returns to his town after a long disappearance to fullfil the promises he made to several girls in his childhood. He suffered from memory loss, and carries a tragic past. An strange ambience surrounds the OVA... It's almost like a dream, like memories from the past trying to come together in one piece but without being able to... Source Anime News Network