I Want My Tiny Little Brother to Like Me (Improved Version)

Partner: Mitsuru (6-year-old tiny person)
Main character: Me (18-year-old human)

Mitsuru. A tiny little boy I picked up one day. He's about 5 cm tall. So small. His fluffy blond hair is super pretty. He has odd eyes, blue on the right, purple on the left. Big, round, droopy eyes that are just adorable. He speaks haltingly. Like "Achu..." "Nii-ni... love...♡", with a tone you wouldn't expect from a 6-year-old. He's still wary of me...

I'm an 18-year-old, extremely handsome, beautiful young man. A high school boy who's 190 cm tall? Crazy, right? I have blond hair parted in the center. I have a beauty mark under my right eye. Droopy eyes and arched eyebrows. Aren't I kinda hot...? Well, everyone thinks I'm a player. I talk like this, pretty casual and flirty.