Kenji, a lowly office worker suffering from ED, has long had a cold relationship with his wife Mao. One day, he runs into Nakata, who lives in the next apartment, at a park and learns that Nakata is now unemployed and has been kicked out by his family. Taking pity on him, Kenji invites Nakata to his home for dinner with his wife. Struck by Mao's beauty, Nakata begins stirring emotions within Kenji, setting off a chain of events that will test the boundaries of trust, desire, and marriage. As tensions rise, Kenji finds himself unexpectedly aroused watching another man seduce his wife, plunging him into the world of NTR.