Hoshino is a mousy glasses girl with bangs hiding her eyes, utterly unremarkable office drone. One overtime night, she finally fucks her crush, the notorious office stud. Shaking with shame while stripping, super conservative at first, but one fuck transforms her into a raging nympho! She unleashes every advanced filthy technique from her secret porn comics stash, tormenting him till he's limp and drained dry to the bone. Roles reverse: passive prude becomes ferocious dick-tease, their flip-flopping fuck-fests repeat endlessly in the office...