Keisuke is grieving after ending his relationship with Chizuko, feeling like he has lost a part of himself. He meets Koushi, who claims to be Chizuko's son, bringing him joy but also telling him that Chizuko is deceased. Koushi, raised by his grandmother, yearns to meet the person who gave him life through organ transplant. Despite their different circumstances, they both long for connection and happiness, but are faced with challenges that make it difficult for them to find it together.