Itsunori falls for his coworker Mai Onodera at their company’s pre-employment ceremony and pursues her until they begin dating. Once hired, they are assigned to different departments. Mai’s sales job involves frequent parties and social events, feeding his fears that she might cheat or be harassed while drunk. Those worries awaken an NTR fetish: he wants to see his beloved girlfriend taken by another man. Unable to suppress that warped desire, he arranges for a junior acquaintance from university to seduce and take her.