Rino's life takes an unexpected turn when her mother's younger sister, Miki, suddenly visits her home. Miki is a lesbian who once lived with them but left under mysterious circumstances. When she suddenly kisses Rino, Rino is shocked and overwhelmed with discomfort, unable to do anything but avoid her. Rino lives alone with her mother after her father's infidelity led to their divorce. Her mother has always been supportive of lesbian relationships, even encouraging her daughter. Amid this complicated daily life, Rino begins to change. Will her relationship with Miki mark a new beginning, or become a path toward healing old wounds? As Rino gradually closes the emotional gap between them, her inner conflict and shifting feelings unfold in a deeply moving and shocking story.