Do or Die!

Hee-kyung has long harbored an unrequited love for Oh Tae-joo, the lover of his twin brother, the recessive omega Kang Hee-won. Having graduated high school without confessing his feelings, he thought he would never see Tae-joo again. However, an unexpected connection emerged when Hee-won and Tae-joo started dating. Watching the couple from the sidelines brought him agony, yet he was glad just to be able to see Tae-joo like this. "What are you doing right now?" "Ah, h-how did you..." "You gave me the passcode for the door lock. —Hee-won." Then one day, he ends up sleeping with Tae-joo, who mistakes him for Hee-won. From that moment on, Hee-kyung begins deceiving them both, playing the role of Hee-won in front of Tae-joo. However, pretending to be the omega Hee-won when he himself is a beta proves to be far from easy... "Why does it seem like you're not getting as wet lately?"