"Can there be pure friendship between men and women?" A wet, sticky oil massage in a private space! Leg-to-leg penetration? Intimate ejaculation beauty project NPJB-214

Although they both say they're just "pure friends" and don't see each other as romantic partners... if they're really friends, then touching each other's bodies shouldn't be a problem, right? Could it really turn into something erotic? This time, they're challenged to a wet, sticky oil massage experience! Shiny, oily skin, and paper underwear torn by a penis, reducing the fabric area by 90%... Rubbing their legs together in the wet, sticky mess... Will the test be successful? Or will it turn into sex? This work is 190 minutes long.