Yu and Ryosuke were not only coworkers but also had a friends-with-benefits arrangement. However, after Ryosuke was assigned to work overseas, they lost contact suddenly. One day, they find themselves unexpectedly meeting again at a police station due to some trouble caused by Ryosuke. To add to the surprise, he announces that he will be staying at Yu's home until he secures a new place to live! As this unusual new chapter of cohabitation with his former friend-with-benefits begins, Yu recalls a promise made in the past: "You know, if we ever get serious that'll be the end." With stunning artwork, KANIHA presents a heartfelt salaryman romantic comedy!