Jilted and heartbroken, 20-year-old Kinoshita Kazuya turns to Diamond, a Rent-A-Girlfriend app that leads him to a fateful encounter with Mizuhara Chizuru, one of the talents on offer.

Kazuya barely has time to deal with the fallout of the situation in the pub before the gang heads off on a short trip to Izu, where they run into someone unexpected.

Mami's plan comes to a head as Kazuya decides to set the story straight, to mixed reactions.

The aftermath of the ferry incident signals a clear shift in Kazuya's feelings. Meanwhile, there's a conspiracy brewing at the hot springs inn he and his family decide to visit.

Having to spend a night in the same room with Chizuru sends Kazuya's heart and mind racing. Meanwhile, Kuribayashi Shun has a surprise in store...