Yuya, raised in a poor household, had grown accustomed to visiting his childhood friend Shigeru's home for free meals even after entering college. One day, after seeing an advertisement for an aphrodisiac posted on a telephone pole, Yuya couldn't stop thinking about Haruka's sexy lips—and soon gave in, purchasing the drug. Unable to restrain himself any longer, he spikes Haruka's drink with the aphrodisiac and moves in to assault her, setting off a chain of events leading to her complete domination.