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"You spent the night with the guy who was your childhood friend??!"

From the obstetrics office to high school, I spent most of my life together with him, Ji Seo-jun. Thanks to his dazzling good looks, I, Moon Da-yul, his best friend, had to endure a difficult school time and swore I would never get involved with him again. But… after getting drunk, I woke up in a strange hotel room, and next to me was Ji Seo-jun! Can our 29-year friendship survive?