Wataru, a 20-year-old straight-living youth, is deeply infatuated with his girlfriend and cherishes every moment spent with her on weekends. Lured by the payment despite initial hesitation, he nervously insisted, "I'm not into guys..." when asked about attraction to men. However, his feelings take a sharp turn once the experience begins. Starting with intense deep kissing, Wataru honestly follows the man's lead, surrendering his body as their lips lock. As his clothes are stripped away, revealing his smooth skin, his cock is already rock-hard inside his pants. Looking down, he greedily sucks on the man's thick shaft, moaning softly between breaths. Then comes his first anal penetration. Two uniquely shaped dildos aggressively stretch his tight hole, making him writhe in agony. "It hurts! It really hurts!! I can't take it!!!" he screams with a twisted, pained expression. Overwhelmed by the intensity, he takes a moment to recover before moving on to blowjobs. Even with clumsy technique, his mouth drives the man's cock to full hardness. That rock-solid cock then plunges into Wataru's virgin ass. Enduring the initial pain, his moans gradually shift into confused gasps—no longer sure if it's pain or pleasure. Riding on top, Wataru starts thrusting eagerly, crying out loudly. Switching to doggystyle, then missionary, each new position pushes him into increasingly frenzied ecstasy. Having tasted a man's pleasure, Wataru may no longer be the straight guy he once claimed to be.