On a family-wide trip, Juri loses her return flight ticket, and only Katayama and Juri, who can arrange for them, end up staying in a shared room for one night. However, this was a plan to ensure that Akari, who has been in love with Katayama since she was a child, is alone with her! Katayama refuses sexual relations due to her sense of responsibility as a parent, while Akari conveys her pure feelings and forces her to physical relationships. However, when she stares at her with moist eyes and gives a lovey-dovey blowjob, her reason collapses...