The Toy or My Tongue, Which One Do You Prefer? Sex With My Sadistic Rival and the Finest Toys

Kaede is employed at a lingerie company, with her goal being to design cute underwear. However, she is then assigned to "Adult goods research"!? And to top it off, she has to work with her greatest rival and colleague, Kanbara?? She remembers declining Kanbara's ridiculous suggestion that they do the research together, but, moments later, the toys and his hands are bringing her to very first orgasm! "So? The toy or my tongue, Which one do you prefer?" He asks, while she's lost in the throes of passion...! The story of this rival couple's passionate love.

Original Manga