Hee-soo, a 18-year-long “never-dated” individual, ironically happens to be the school's top relationship counselor. Secretly, Hee-soo has been harboring feelings for his best friend of 10 years, Joo Chan-young. With zero chance of success, he had decided not to confess and to nurture his bittersweet unrequited love alone. However, someone anonymously identifying themselves as “Carrot” begins expressing their affection toward Hee-soo. "Could this possibly be Joo Chan-young? Does he like me too?" Hee-soo's mind becomes increasingly complicated by these unknown declarations of love.