Hina had been living an unfulfilled life with her childhood friend and older boyfriend, Yoshiaki. After seeing a video of the greedy sex she saw on a dating app from a guy with a secret account, "Shinobu-san," she impulsively contacted Shinobu and decided to meet him. Although she was confused by the tingling in her stomach just from Shinobu playing with her nipples, she became immersed in the pleasure she had never experienced before... "It's okay to keep loving him. Our relationship is just to satisfy our lusts..."