After pining after a scumbag for seven years, Song Feiran swapped bodies with the scumbag's first love. The scumbag chased after his first love while still being unable to let go of his substitute, caught between the two of them. To finally get rid of this lunatic, Song Feiran and the first love hatched a plan: pretend to be a couple and team up to teach the scumbag a lesson. They never expected him to grow crazier by the day, while the first love's aloof, celibate older brother began looking at them in increasingly suspicious ways.
