Representative director of âge at ACID Co., Ltd. and one of the founding members of doujin circle "relic" (now: âge). He's the creator of the successful visual novel Kimi ga Nozomu Eien, Muv-Luv and Muv-Luv Alternative. He also did mechanical design for the Muv-Luv franchise and wrote other side-stories related. His real name is Yoshida Hirohiko.