It all started with a trivial, tiny incident. On her way back from shopping, Sachiko felt the urge to urinate and rushed into a nearby house, but unfortunately, no one was home. Unable to hold it in any longer, Sachiko relieved herself on the spot. However, she was spotted by the resident who had just returned home. With a lecherous grin, the resident blackmailed her with charges of trespassing and public indecency. Because of a single failed attempt at urination, Sachiko ended up being forced into various humiliating urine play training sessions.
