[Hachihachihachi] Kyou mo... Nyoudou Choukyou Suru no? | Another Urethra Training Session Today…? [Castle TL]

Two women engage in a provocative urethra training game, with the confident senior commanding the nervous junior to endure relentless clit stimulation and a vibrating toy. Day 2 shows the junior’s strained reactions as the senior threatens harsher punishment if she drops the device, while the tension escalates through teasing, edging, and a promise of a wet reward. The story unfolds as a yuri doujinshi exploring power dynamics, sexual frustration, and the promise of ultimate satisfaction.