Why did they even start living together I don't remember

hi it's because takamada had to go back to Tokyo or something, and yu chased after him and they decided to live together so that you doesn't have to travel so far to meet with him

because yu's shop/house is under renovation, he was gonna go back to his hometown with the rest of his family (mie) but takamada convinced him to rent a place together in tokyo saying mie was too far away from the shop plus it would be hard to hook up. yu accepted because "he couldn't jerk off at this grandma's house" or somethin