When Chihaya Ayase was in the 6th grade of elementary school, she met Arata Wataya. Arata Wataya transferred from Fukui Prefecture. Taichi Mashima was Chihaya Ayase’s friend since they were…

“A world” – After graduating from a university, close friends Takashi Tsurug and Tomohiko Miwa begin work at a company which does brain research. One day, Tomohiko introduces Mayuko Tsuno…