Lewd Laboratory Adventures: Yuri Machine Sex & Twintailed Pleasure in Mashin Kenkyuu-bu no Nichijou
Dive into the depraved world of Mashin Kenkyuu-bu no Nichijou ([けいしきん] マ震研究部の日常) where lab coats come off and sex machines roar to life! This 26-page Japanese doujin by Keishikin features horny researchers Aya (twintails bouncing) and Rina (ponytail swaying) exploring yuri pussy grinding on vibrating dildos and unusual teeth nibbling clits. Their females-only club becomes a wet paradise of big tits smeared in lube and assholes stretched by mechanical tentacles. If you crave more machine-fucking madness, explore this series or check this similar steamy tale!
Daily Ecstasy of Machine Research Club: Females-Only Toy Experiments and Climaxes
The machine research club transforms into a symphony of orgasms as Aya’s twintails get tangled in bondage gears while Rina’s ponytail whips across her lover’s dripping pussy. Watch them climax uncontrollably as steel rods piston their g-spots, squirting onto circuit boards! Keishikin’s art captures every lewd detail—from unusual teeth marks on nipples to sex toys drilling assholes until screams echo. This multi-work series promises more filthy experiments, like neighbor’s secret broadcasts or Kurone-chan’s refusal to forgive. Don’t miss the moment Rina cums hard with a remote-controlled vibrator buried deep—her big breasts jiggling as she squirts onto Aya’s tongue! Pure yuri ecstasy awaits in every page!
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