To summarize briefly, it's a story about an office lady who has an erotic fantasy and masturbates in the toilet. However, the fantasy sex is a sticky sex with Higa in a cheap apartment during student days, or a crazy fantasy of being restrained and hung from the ceiling by a suspicious person, tied with a tea towel and having her pussy raped. It's fun. And when I watched it till the end, it was great that there was no need for the setting as an office lady!
