The cosplayer who brings a smile to the face of a downtrodden otaku uncle, the "Smiling Virginity Deflowering Goddess"—Shizutsuki Kokoro (MUKC-102)—is the role-playing character.

The lewd cosplayer Koharu-chan, who brings a smile to the face of a downtrodden otaku uncle, has arrived! Adorable cosplay attire, she smiles and gives her all, ejaculating through masturbation, oral sex, and vaginal penetration! So pleasurable that even male ejaculation occurs! "Muku-Cos" features fully clothed sex, intense 3D cosplay, and a lewd woman who ejaculates non-stop! With 13 ejaculations, the uncles are perfectly satisfied to be drained of their semen by this girl. The gentle beauty to the uncles is ultimately the most lewd.