第11話: 長崎におけるKouの過去と、その心へ届けるFutabaの願い
2014年9月16日 放送
It is revealed that when Kou disappeared in middle school, it was because his parents divorced and he moved with his mother to Nagasaki. However, his mother was terminally ill, leaving Kou to feel helpless and alone. Futaba learns that Kou is suffering even now because he blames himself for being powerless. She wishes Kou had told her earlier and she wants to break open the door to his heart. (Source: Wikipedia)