Ushinawareta Mirai wo Motomete

, subtitled À la recherche du futur perdu ("In search of the lost future" in French), sometimes abbreviated as Waremete (われめて), is a Japanese adult visual novel developed by Trumple and released for Windows on November 26, 2010. There have been two manga adaptations published by Kadokawa Shoten and Media Factory. A 12-episode anime adaptation, produced by Feel and directed by Naoto Hosoda, aired in Japan between October and December 2014.

Plot
Uchihama Acedemy has seen an increase in enrollment in recent years and as a result, a new school building will be constructed. The story takes place during the final school festival in the old school. All the club leaders decide to give it their all to make this the best school festival. Sou Akiyama is a member of the notorious astronomy club, which basically solves the various issues in the student council's place.

On one day, he stays in the school late at evening because he got slightly injured by the judo club and is healing his wounds in the infirmary. Suddenly, the building shakes. Shocked, he runs up the stairs to where the shaking seems to have centered, and there he encounters a mysterious naked girl, whom at first appears to know him. On the next day this girl, Yui Furukawa, seeks out the astronomy club, expressing her desire to join.

Official

 * http://ushinawareta-mirai.com/ - Anime official website