I mean, he does seem like a total airhead who adores his brother but the way he blushed a little after patting her head (in the page in the link) doesn't seem normal even to an idiot like him. I think he knows something. http://www.mangago.me/read-manga/kenka_bancho_otome_koi_no_battle_royale/nbt/0cfdcf4288d9b496/Vol2_Ch4/pg-39/
I mean, he does seem like a total airhead who adores his brother but the way he blushed a little after patting her head (in the page in the link) doesn't seem normal even to an idiot like him. I think he knows something.
http://www.mangago.me/read-manga/kenka_bancho_otome_koi_no_battle_royale/nbt/0cfdcf4288d9b496/Vol2_Ch4/pg-39/