Luna, a designer working in Tokyo, accidentally injures the son of a client company’s president. Proud and strong-willed, she reluctantly goes to apologize, unaware that the tea he serves contains a diuretic. No matter how much she begs, he refuses to let her use the bathroom until she humiliatingly wets herself on the spot. He then uses her weakness to harass and control her, forcing her to serve him with blowjobs and tormenting her with toys until she urinates repeatedly. As her will and bladder are gradually broken, Luna is made to cum, take repeated creampies, and urinate again and again.