No Matter How Painful a Memory is, It is a Treasure to Me.Episode Libra Part 1. It begins when Tsukiko enters the nurses office and finds Kotarou Hoshizuki, the school doctor, sleeping lazily on one of the patient beds. Kotarou then takes over and reminisces about a past memory that both has brought him great joy but also terrible sadness: his first meeting with the twins Iku and Yui Mizushima. Before meeting Iku and Yui, Kotarou had been living a monotone life and didn't really look towards his future...