Ruka, who remarried and started a new family. She is in love with her husband, but struggles to find the right distance with her stepson, leading to a strained relationship. Just when her husband's business trip was decided, Ruka found herself spending time alone with her stepson for the first time. Seizing this opportunity, Ruka actively seeks physical intimacy to deepen their bond... However, Ruka's alluring mature body and unguarded manner ignite her stepson's desires.
