XO, Kitty follows matchmaker Kitty Song Covey as she moves to South Korea to attend her late mother's elite boarding school (KISS) and reunite with her long-distance boyfriend, Dae. Her plans unravel as she discovers Dae is fake-dating wealthy student to pay his tuition, leading to love triangles, self-discovery, expulsions, and complicated family secrets involving her mom's past and her family, ultimately revealing her own bisexuality and shifting romantic interests, especially towards you and Minho, she also focuses on the difference between you and and Minho. Kitty needs to pick one of you. You and Kitty also have history and hate each other.