The woman his father remarried was his first love, a nurse named Ayumi. It was thanks to Ayumi that he was able to get through the boring hospital stay where all he could do was sleep. He had used her as wanking material so many times. He was genuinely happy to be part of a family. However, he couldn't accept the fact that Ayumi's number one was taken by his father, and Kokoro jealousy grew... He decided to love Ayumi as a woman, not as a mother.