[Contest 3] Terrible Cohabitation

Sehun and Chanyeol, sons of a wealthy family. They've been close since childhood, and although they bicker and quarrel in their second year of high school, they're still best friends who take good care of each other. Their parents even bought them a luxury studio apartment during their high school years, making them roommates! And there was another person living in this luxurious studio apartment!