ATID-556 Find strange feelings with your best friend's wife

Takahiro and Tsubaki have been married for two years. We started to see parts of each other that we couldn't see, and our fights over trivial things became more frequent. After hearing Tsubaki's complaints, her co-worker Mitsuki invited Takahiro and the Tsubaki couple to her house and suggested that they swap couples just for the weekend...