When they first met, the sickly face hidden under the black hair made him want to hide in hiding. He promised his disciple to take him back, but he didn't want to bring this into his heart, and he was willing to protect him for the rest of his life.
When he was young, he was in love. He was afraid of being betrayed by tenderness, so he just wanted to stay quietly. Maybe he was different, and he couldn't help but be intoxicated by the promise of beauty.
PS: The cover picture was found online. I don't know who drew it. If you mind, it will be deleted.
Conception: