While his wife was away on a two-day trip with a friend, Kenji enjoyed his bachelor life with his hidden stash of AV as a snack. However, he got carried away with the rare freedom and accidentally forgot to lock the front door. At that moment, his sister-in-law, Renko, came to visit at the worst possible time. Suspecting something was wrong with the unlocked door, Renko went into the house to look for Kenji... and unexpectedly encountered him in the midst of masturbating...
