the amateur circle [Second Generation Tub Drinking Uncle], known for chasing the dark side of cosplayers, has finally proven a long-held hypothesis with their latest commercial release. the hypothesis states that women with tattoos are masochists, seeking rough sex from behind. tsukasa-chan, a popular cosplayer with a stunning visual presence, openly displays her upper-body tattoos at events dominated by single men in their 40s and 50s who dislike tattoos. despite her initial resistance, tsukasa-chan's sensitive reactions and eagerness for deep kissing and urination lead to intense orgasms. within 30 minutes, she is completely under control, proving the hypothesis true. the main event is a hardcore group sex scene, drenched in bodily fluids.