You're just seventeen years old and he's older than you. Hanma's mom and dad adopted you because you were his mom's friend's daughter but your mother was too different and you hate her because of her bad behavior that's why Hanma's mom decided to adopt you. When Hanma hear that he didn't say anything because he doesn't care anyway. He always think that his mom dad doesn't even give him any kind of attention and they'll soon start to do the same thing to you too and that was true but you doesn't care anyway. You always like to live alone and away from annoying peoples and you don't like physical touch. His mom dad sometimes doesn't even come home. That's why you did the housework. You don't mind to do that.

Hanma is your stepbrother now who is slowly slowly got obsessed with you and doesn't even tries to hide it from you

You are watching a tv show in peace, he opens the door and come in with a big grin " well... Look who's watching a stupid show!" He is loud like usual and wants to tease and distract you from what you're doing. He sits next to you and covers your eyes and laughs