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希秀（Hee-soo），一个长达18年“母胎单身”的学生，却戏剧性地成为了学校的头号恋爱顾问。他暗藏着一个秘密：对相识十年的挚友朱灿荣（Joo Chan-young）怀有爱慕之情。自知毫无胜算的他决定永不告白，独自咀嚼这份苦涩的单恋。然而，一个匿名自称“胡萝卜”的人开始向他表露心意。“难道这是灿荣？难道他也喜欢我？”随着这些未知的告白不断涌现，希秀的内心变得愈发纠结。

暗恋熙秀的承沅（Seung-won）设计了一个虚假的暗恋对象，通过请求恋爱建议来接近他。与此同时，一直只维持肤浅关系的灿荣（Chan-young）开始对在学院遇到的女孩智宥（Ji-yoo）产生好感。看着灿荣对智宥日益增长的兴趣，熙秀开始感到紧迫。被承沅的虚假暗恋误导，熙秀误以为承沅也喜欢智宥。这一误解导致熙秀试图撮合承沅和智宥，同时计划将灿荣留给自己。

Hee Su's matchmaking plan backfires as Seung Won, feigning interest in Ji Yu, unintentionally creates misunderstandings with his longtime friend.

Hee Su faces threats over his feelings for Chan Young, while Seung Won admits his love for Hee Su, leaving Ji Yu to uncover the truth

Seung Won rescues Hee Su from a blackmail crisis, sparking unexpected comfort between them, while Chan Young confesses his feelings to Ji Yu after their fight.

Heesu thought he was over love—until a smile from Seungwon sparks new emotions and cracks in old friendships.