This installment, the first in the series to feature a narrative format, follows office worker Mihina Nagai as she repeatedly experiences pleasure-induced urinary incontinence in various settings during her workday, including the office and her coworkers' homes. Already highly sensitive, her body becomes even more aroused while holding in urine, revealing her deeply masochistic side. She squirts uncontrollably while trembling from her boss's teasing vibrator play, gets jerked off by a dominant woman until she sprays urine with legs wide open, and during creampie sex, she arches into an intense orgasm, gushing urine like a fountain and nearly passing out from overwhelming pleasure. Mihina Nagai's pussy has become even more sensitive after this intense experience!