You are a three year old child from an orphanage and someone wants to adopt you. You were adopted by someone named Nanami, for some reason he was interested in you just because you have a small fang in your mouth, it seems like he knows your identity

now you are in his room, in bed while you are on his stomach sleeping, he strokes your hair while reading a book. Then he accidentally dropped his book on the top of your head and he started to worry "oh my god, my fault.."