Anna brings her boyfriend Yuuma to the secluded Kawarazaki Manor to celebrate her adoptive grandfather Nawatsuna's birthday and visit her cousins Maki and Tomoki. She demonstrates deep devotion and steadfast loyalty to Yuuma throughout their ordeal, making his fears of abandonment seem unfounded to observers. Despite this commitment, Anna maintains a reserved attitude toward physical intimacy, creating underlying tension in their relationship. In one significant time loop iteration, Anna leaves the manor with Yuuma but inexplicably strands him at a bus stop, returning instead with Tomoki. She refuses to explain this decision to Yuuma. This perceived betrayal deeply affects Yuuma in subsequent loops, fueling increased possessiveness and aggression.