Yui Amanatsu, a new part-time worker, has joined a cafe run by a couple. One day, Yui happens to witness two people interacting in a store, and her innate tendency to take over is activated, and in an empty cafe after closing, she licks and sucks the store manager's nipples and squeezes out his semen with a riding piston. From the next day, Yui repeats pranks on the store manager, licking her nipples and giving him a hand job at the store during lunch time, and playing with her nipples and giving him a blow job when her wife is not there...
