Inoue is a greedy girl who wants to enjoy both thrills and romance, and has a secret sexual relationship with Ninomiya, a colleague at the same company, and has a crush on Nikaido, a colleague at the same company. One day, she decides to go to Ninomiya's house for a change, and when they start having sex, Nikaido shows up! It turns out that Ninomiya and Nikaido are actually roommates, and a forbidden love triangle unfolds...!