Soulmate [VertiComix]

Two girls are friends, relatives, and soul mates. Yu Qi, a 17-year-old high school girl, wakes up to her soul having been swapped with her 27-year-old self. On one side is a lover who has been together for many years but reunited, and on the other side she is forced to be the girlfriend of an unfamiliar person. One of them reunites with her long-time lover, though they've been together for many years, and the other is forced to be the girlfriend of a stranger. Both of their worlds are changing, but one thing remains the same: you, the one who is by my side.