A super-busty girlfriend, so gentle it's almost overflowing, is taken advantage of by a thug senior and forced into a sexual relationship. (Ayatsuki Nanao DSOD-060)

College student couple Nanao and Nobuyuki live a happy life together. Until one day, they encounter Nobuyuki's senior, who is also a local thug named Yanagisawa. Yanagisawa, who already bullies Nobuyuki, sets his sights on Nanao and breaks into their apartment while Nobuyuki is away. He slips an aphrodisiac into Nanao's tea and forces her to drink it, turning her into aroused. Every time her body is touched, Nanao feels extremely pleasurable, and despite her attempts to resist, she succumbs to the pleasure and accepts Yanagisawa's penis! Afterwards, although Nanao is repeatedly forced into sexual relations, she unknowingly becomes infatuated with Yanagisawa…