[Senya Sabou (Alpha Alf Layla)] Aru Hi Okitara Chinpo ga Haeteta no de Otokonoko ni Mechamecha Nakadashite mita [mysterymeat3]

An anxious, voluptuous girl in a simple white shirt discovers a sudden, massive erection that forces her to aggressively thrust into a delicate cross‑dressing boy, igniting a heated encounter that blends shock, desire, and the thrill of a forbidden first climax. The story follows Serene‑chan, a confident trap cosplayer who, after being teased about her slender waist, finds herself overwhelmed by the overwhelming size and vigor of the unexpected penis, leading to an intense, relentless anal penetration that pushes both characters to the brink of ecstasy and surrender. With each thrust the tension escalates as the powerful male’s relentless thrusts target her tight, sensitive core, delivering a climactic, ahegao‑filled finale that cements their twisted, intimate bond.