Yea the story was good and all ,but every time something like staying the night or a date. I would be like who’s watching the kids they at home alone. I would think in my head oh the mom on a business trip ,so she must be rich so theirs like a nanny. who watches the and stuff we I know it’s not real so the author might of have thought that deep into it but thing that way eased my conscience a little.
This is my thought after i read the chapter that their mother left home for business trip and there's no mention about the mother is at home after that. Its like the kids are alone at house and even send their bro's clothes? Wth. Well maybe they have a nanny (?) i assume, but not a lot of people will think that deep tho

Through this whole manga I'm thinking what an asshole of a brother he is to take his merry behind everywhere around town, have week long sleep overs and barely be home with his barely 6 and under siblings. Cause they never made mention that the mother came back so it seems the kids where at home by themselves all the time. I mean they even had to bring him his clothes after a sex session because his ass decided to stay overnight without letting them know. I mean if this is not true then at least give the readers some context so we won;t assume the uke is not just a jerk.