Nanatsu-iro Drops Episode 12

Tsuwabuki is a normal student, though not very social. One day he meets a new transfer student, named Sumomo Akihime, and another girl, both the only members of the gardening club. Tsuwabuki is forced by a teacher to join this club. But then he bumps into a strange guy with dog ears, switching his drink with they guy's by mistake. Drinking it, he is turned in a stuffed animal. The teacher tells hi