Ms. Mitsumoto is a clerk whose natural good-naturedness often works against her, leaving her in pitiful situations. However, her hidden true nature is that of an overly lewd sexual monster! It all started with a colleague's prank after noticing her hidden huge breasts. "Ms. Mitsumoto, your tits are surprisingly big~ Let me feel them for a bit." These words, spoken as a joke, stimulated her hidden nature, opening the curtain to a sensual world of raw passion where she drowns in sex all night long...