My Partner's Preferences and Fetishes

Jun has always strived for perfection, but he constantly finds himself in second place behind his academic rival, the over-achieving Cha Si Won. After a drunken mistake leads Jun to flee to the army for two years, he returns only to find Si Won in all his classes—and carrying the exact same phone model. When an accidental device swap exposes Jun's secret BDSM preferences to his greatest competition, their relationship takes a steamy and unexpected turn. This BL webtoon explores how a rivalry transforms into a complex, consensual romance.