This story took place at the time when Kousaka Kyousuke was persuading Sakurai Akimi to go to school. It is about Aragaki Ayase's real brother living his life before leaving Ayase behind. He has done many sort of things which lead to the background plot of the main story of Kousaka Kyousuke. What makes Ayase's brother left her and why did Ayase forget about him? With continuation.