Bad Memory Eraser tells the story of four coming-of-age characters namely Lee Goon, Kyung Joo-yeon, Lee Shin, and Sae Yan, finding their true selves and healing their pain through love

The drama follows Lee Kun, a former tennis star played by JYJ’s Kim Jaejoong, whose life is turned upside down after a memory-erasing surgery. Jin Se Yeon stars as Kyung Joo Yeon, a neuropsychiatrist who accidentally becomes Lee Kun’s fake first love through a series of unexpected events.