ADN-545 Humiliating forced infidelity. Kana-san, who couldn't hold it in and urinated at the front door after losing her keys, finds herself drawn into a secret fetish she can't share with her husband after being seen by her nephew. Morisawa Kana.

"Oshigama" is short for "holding in urine." People are increasingly getting hooked on the sense of release from holding it in until the limit. [Plot Summary] One afternoon, Kana, returning from shopping, couldn't find her key at the entrance and ended up wetting herself. The one who happened to see this was her neighbor's nephew, Kazuya. Since that day, Kazuya can't get the embarrassing sight of Kana out of his mind and starts stalking her...