One Home, Two Lives

Plot Synopsis

After breaking up with her boyfriend and leaving all the annoying parts of her life behind, Jeong Ha-Ra has a one-night stand with a beautiful woman she met at a bar, but is woken up in the morning by a confused scream, as the woman she went home with seemingly has no idea who she is or why she's in her bed. Fascinated by her, Ha-Ra decides to pursue her despite her protests, and eventually finds out that two different people share that body - the confident and enigmatic Lee Jun-Hui, and the serious and timid Yang Go-Eun. After various shenanigans, the three end up living together as roommates, and slowly begin to figure out how their relationship works.

How is it plural?

Go-Eun and Jun-Hui are explicitly stated to be a system, and are shown to both be aware of each other and communicate via a shared notebook. Jun-Hui appears to retain memories from when Go-Eun is in front, but the opposite does not apply as consistently, and the series delves into both their relationship with Ha-Ra, the trauma that caused them to split, and related topics like dormancy and memory barriers.