This feels like the perfect setup for a drama where what she actually wants is parental affection and is immaturely mistaking that for romantic love. But then his sister's like "it's perfectly fine for them to date even though she's 13 as long as they don't fuck until she's older", which is both kinda bizarre and also indicating that there actually will be a romantic conclusion. How accepting this manga is of their romance makes me feel kinda uncomfortable reading it.
