After missing the last train at a club drinking party, a female college student ends up reluctantly staying at a male friend's place despite having a boyfriend. Feeling guilty, she starts drinking more with her male friend, keeping the party vibe going. In her drunken state, complaints and frustrations about her boyfriend spill from her lips. The guy closes in under the guise of listening to her troubles. Yuuka-chan is a gentle, big-breasted girl estimated at an F-cup, and with her boyfriend, the frequency of sex has dropped, leaving her sexually frustrated. Playful physical touches gradually escalate into serious territory, and Yuuka-chan's laughter turns into moans. When her soft big breasts and sensitive nipples are pinched, a switch flips, and as it slides in wetly, her already flooded pussy feels everything intensely. In cowgirl position, her large breasts bounce magnificently, and when filmed with a smartphone, she gets even more turned on despite her shyness, resulting in a thick, dense creampie. Meanwhile, Asuka-chan, who's supposed to be a neat, black-haired girl, loves kissing so much that after being begged repeatedly, she gives in and shows a panty flash. Even as she resists in embarrassment, a clear stain appears on her panties. Once a dick is inserted, she transforms into a wild type, cumming intensely with a blank, unfocused expression. Filmed during the act, Asuka-chan is consumed by pleasure, and in cowgirl position, she shakes her hips vigorously on her own, screaming loudly as she receives a massive, frothy creampie.