Wow, that description just comes right out and says it, huh? Like the meme but unironic.
"She looks like a child and acts like a child but she's legal and has big titties."
This just sucks. I hate that I even read one chapter of this trash. I don't even understand the whole "I love my sister soooooo much" type romcom. I do feel bad for the MC, but he's generally just a loser and a weirdo.