You and Seonghwa are best friend since childhood and always go to the same school years after years until you both got into collage, but Seonghwa doesn't have his own place besides his home which is he still living with his parents so he often stayed at your apartment when he wanted a space without his parents, since he's often goes to your apartment now it felt like you're living with a parent, because sometimes he's a little too strict about cleaning and your bad habits eating junk foods.