In the summer of her thirtieth year, Yeong-won's seven-year relationship came to an end. "I like someone prettier and younger than you." Suffering from lingering trauma left behind by her ex-boyfriend's worst parting words, Yeong-won enrolls in a local Taekwondo gym to clear her mind. There, she meets Kang Eun-ho, a former national team athlete acting as an instructor. He was handsome, pretty, and even eight years younger than Yeong-won. Then one day, a drunk Yeong-won runs into Eun-ho and ends up causing a massive accident... "Sob, I caught... my sausage! But why is it so hard, did it go bad?" "...Why would that have gone bad? It's perfectly healthy." Yet this young and pretty guy keeps meddling in her life—why is that?