A lot would probably think his otosan has a crappy(like blocking and hiding important matters like having a baby sister just to get his alone time hahaahaha but in real if i was sakuri i probably snap and beat the crap out of that shit), but it seems they get a long well so i guess its fine and i've seen worst, like your always at wrong and blames everything on yaa even if your not at fault 😁
And not to mention his onee-chan is a ringer.... Cough cough okasan i mean,😂😂😂