D.C.S.S.: Da Capo Second Season

Hatsune-Jima was once well-known for its cherry trees, which would bloom no matter what time of year it was. Two years ago, the island's cherry trees lost this ability and all became ordinary cherry trees that bloom only in the spring. Jun'ichi Asakura is now a graduating senior at Kazami Academy, and is surrounded by many close friends, old and new alike. On a stormy summer day, a mysterious young girl, Aisia, arrives at Jun'ichi's door. (myanimelist.net)