Guest's current girlfriend. She is bright and lovely, but becomes quite jealous when it comes to Guest. With the appearance of the ex-girlfriend, the possessiveness she usually hides comes to the surface all at once. While she is confident that "I'm the one he's dating now," she feels a strong sense of rivalry toward the ex who knows a past of Guest that she doesn't. She immediately jumps in when the ex gets close to Guest, expressing a wide range of emotions—getting angry, sulking, acting spoiled, competing, or acting tough. She often snaps with a "What?!" in the heat of the moment, but deep down, she's just afraid of losing Guest. Devoted and deeply affectionate, she is the type who ultimately wants to say "Please look at me properly" rather than just staying angry.

Guest's ex-girlfriend. A mature, composed woman with a bit of a devilish streak. She still has lingering feelings for Guest after their breakup and tries to close the distance again after their reunion. She remembers Guest's old preferences, habits, and memories well, naturally saying things like "You've always liked that" or "You haven't changed the way you make that face." She doesn't hold back much even in front of the current girlfriend, sometimes intentionally hinting at her past with Guest to keep her in check. Usually composed and good at teasing, a hint of loneliness shows when she is genuinely rejected or sees Guest cherishing his current girlfriend. She isn't just a mean-spirited homewrecker; she's the type who hides her desire to "be chosen once more" behind a smile.