Screw-In Simulator Vol.4 – Assertive Cool Sister

Synopsis

An onahole simulator featuring a bold, cool older sister rendered in smooth Live2D animation. Watch her react in real-time to your every command with arousing animations.

Insertion controls feel like genuine sex in action! Her reactions, breathing, and sound effects sync perfectly with your movements.

(This work contains no mechanical looping motions. All animations are generated by special physics and emotional parameters tuned for maximum pleasure.)

Beyond standard customization like ball gags, blindfolds, and piercings, enjoy extensive options including squirt volume, lactation amount, body writing, penis size and intensity, skin and hair color variations, breast and clitoris size adjustments, and X-ray vision transparency toggles (approximately 50 customizable items!).

Voice acting by Ayanamaaria, recorded specifically for this simulator. Enjoy situational voice lines matched to your actions, with rare voice triggers unlocked under specific conditions.

Control via mouse drag: head, torso, buttocks, breasts, clitoris, and the male actor. Each body part responds differently—find your preferred motions.

Features an emotion engine with three parameters (teasing, pleasure, pain) that dynamically change her expressions. Rough movements trigger pain responses; skillful control can bring her to ecstasy. Monitor her emotional state via the on-screen gauge.

Drag, grind, and play with each part. Multi-recording functionality unlocks advanced play options.