Lee Changyeon is a trashy top whose favorite hobby is opening up virgins all the way to their colons. His golden rule in life? Never look back at a man he’s already slept with. However, a thunderbolt out of the blue shatters his arrogant lifestyle: he is struck by an absurd curse that shrinks his dick every time he ejaculates! To make matters worse, the only way to break this damned curse is to receive semen deep inside his own colon.

Well, how hard could it be? Sex is sex, so what if he’s the one taking it for a change?

Changyeon immediately goes hunting for a well-endowed guy. Enter Bu Silhan, a cute, petite man who looks anything but hung. Though Silhan confidently claims he can break Changyeon's curse, Changyeon dismisses him, completely unaware that the fragile-looking guy is secretly hiding the massive monster cock he's been desperately searching for.