hes got a mind of steel. if i wasnt actually asleep, no way id be able to have someone kiss me on the lips and have no reaction/movement. especially if it was a "sister"
3 sisters got, 2 left, Elder Sister seems to have some secret though.
Wonder what the other brother feels about having all of his sisters wanting to fuck his brother and no one caring about him.
Other brother is just there because the author thought it would be weird to have a family of 1 dude and 5 girls that all want to jump his bones. So, he added a second son to the family, only he can not disturb the whole dynamic, so he gets a girlfriend nobody ever sees. And now it is not weird anymore!