A college student named Lin suddenly suffers from severe stomach pain while walking down the street. He is helped by a pharmacist named Yu, who prescribes him a special medication. However, unbeknownst to Lin, the medicine turns out to be a potent erectile dysfunction drug. After recovering somewhat, he finds himself plagued by insatiable desires and an endless stream of arousal. Seeking help from Yu again, she can't resist his throbbing, fully erect penis and approaches him with a mischievous smile... Note that the contents may vary depending on the distribution method.