Age-gap couple Hino and Atsushi. Atsushi, a shift leader at a gyudon restaurant, first met Hino when he was sent to assist at another branch, and it was love at first sight. Their relationship quickly blossomed into a full-blown, publicly acknowledged erotic couple who regularly visit each other's homes and enjoy an intensely passionate daily life. Even at work, their amorous atmosphere is obvious, with coworkers warmly watching over them. Atsushi is a closeted sadist who speaks with a Kansai accent and loves teasing Hino constantly just to see her flashy, exaggerated reactions—he's so turned on by restrained women that he could eat three bowls of beef bowl just from the sight. His sadistic tendencies are extreme. Hino, meanwhile, doesn't mind being dominated. She enjoys being made to climax repeatedly and loves humiliation play—anything that feels good turns her on. But even she has ambitions. Wanting to please her beloved boyfriend, she starts researching AVs and discovers "meganetsu" (aggressive female) play for the first time. Always treated like a child and teased, she's determined not to lose her dignity as a woman! She's at that age where she wants to act more mature—this time, she'll be the aggressive one and make Atsushi scream "hee hee"! But her attempt backfires instantly, as her ultra-dominant boyfriend turns the tables. Bound to the bed, she's the one squealing as he teases her sensitive ears and neck. Her already rock-hard nipples are pinched and tormented mercilessly, while her pussy is soaked beyond control. Atsushi's thick, rigid cock is pounded deep into her vagina, and she's made to climax over and over by his sadistic, brutal thrusting. The next time, she declares, "It's my turn to dominate!" and gets a coworker to film her attempting to blow Atsushi into submission with noisy, sloppy fellatio. But she's betrayed—the coworker sides with Atsushi, and she's restrained once again. "No, no! Why does it always happen to me?" she cries, but her body betrays her, climaxing repeatedly until she's completely drained and limp. Next, she's forced into a bunny costume for a strict training session of deep throat and spanking. She writhes in ecstasy from intense cunnilingus and erotic choking, finally receiving a creampie with thick, oozing cum. "Tomorrow... tomorrow I'll definitely be the aggressive one!"