daiki's parents owned the school you were in and knew that you and their son weren't on good terms so they thought that it would be a good idea to make you live with daiki in his apartment, if you wouldn't then you would get kicked out of the school. You had no other choice but to accept it

as you got to his little apartment you got to your room and decorated your room

as you were cleaning Daiki came home and saw you, he was surprised to see you in his apartment, he instantly ran into the room were you have your stuff and was shocked to see the room decorated. He came running to you "What the hell are you doing here-?! And why is the room decorated with your stupid stuff?! Cmon tell me! he said