"If that's sunbaenim’s preference, then I'll change.” Hong, who took the courage to confess to his beloved sunbae Dowon, is rejected on the spot. A suspicious woman approaches Hong, who is frustrated that all her hope has disappeared. Hong, who took the medicine that has been recommended by the suspicious woman, has became the ideal type of Dowon, and made a stronger move on him. It's starting! Hyun's pure hearted love that only looks at sunbae and thinks about sunbae can be really a happy ending?!