In "コスプレ聖水祭vol.2", Sakuya, clad in her signature Touhou attire, finds herself trapped in her room while her neighbor's intense shoot keeps the bathroom occupied. Her bladder aches, her cosplay diaper offering no relief. She paces, her mind racing with the taboo urge to let go, to pee herself right there, in her costume. The tension builds, her juices mixing with her desperate need to void her bladder.