Reread

In the present, Kuze receives a letter of challenge from Mizuki which draws him out of his home to the Otowa Academy school roof to meet Mizuki. Through her professing words of love to Kuze, he finally gives in and wants to stay in love with Mizuki, but his heart gives out again. Mizuki receives emotional support from Kei, Chihiro and Hiro during this time. Kuze decides to have the risky surgery to try to live longer with Mizuki.