Before her date with Hinano, she unexpectedly caught a cold and had to cancel their plans. The day before, when Hinano visited a nearby clinic due to her illness, the suspicious doctor gave her what he claimed was medicine but turned out to be an illegal aphrodisiac created by a mad scientist posing as a physician. As soon as she took the mysterious drug, Hinano began to feel its effects, becoming highly sensitive all over. Fearing that she might have a serious condition, the doctor threatened her and forced her to continue visiting him. Little did she know, each visit would expose her to his twisted concoctions, driving her slowly insane...
