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.

While Kazuya desperately tries to get Ruka to promise she won’t reveal his secret, she tells him her own.

Chizuru and Mami go on an awkward rental date unaware that Kazuya has seen them together. How can Chizuru handle this situation?