Mika breaks up with Yū and finds Hiro in the hospital, diagnosed with cancer, with only three months left to live. Upset that he pretended he didn't love her only to ensure she would have a happy future, she insists that only he can make her happy. Hiro eventually gives into his feelings and gets back together with her. Mika begins to visit the hospital daily, even taking an academic leave, to take care of Hiro, who slowly begins to show signs of recovery. Hiro's resolve to live becomes stronger until he dies during a check-up. Mika is saddened by Hiro's death and tries to commit suicide, but is stopped by a flock of birds flying towards her. She takes this as a sign of Hiro, in the sky, discouraging her from killing herself, and realizes through this and Hiro's journal that he would have wanted her to continue to live. Seven years later, she reflects on how her life had changed upon meeting Hiro, and that she is living happily with him and their baby in mind.