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SDJS-193 Haru Shibasaki's First-Time Sex Tests for Product Development

Code SDJS-193 Length 3:08:25 Released 2023 Added Aug 3, 2025

Haru Shibasaki, a shy but lewd product development researcher, volunteers her body for testing new masturbation goods, starting with a slippery lotion solo session. She then performs an up-close handjob and fellatio to gauge sensitivity, has sex with an amateur man for the first time, and finishes with her first 3P, all to compare real sensations with the products. The final test counts the pistons needed for ejaculation.

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