Natsumi, also known as "Hamu-chan," hustles at her demanding office job like a hamster running in a wheel. Meanwhile, her boss Samejima is more like a shark. He's handsome, sure, but he's also imposing and scary...at least, until he confesses his feelings for her?! Natsumi is a little overwhelmed by seeing a vulnerable side to this gigantic man, especially since she doesn't have a lot of experience in the love department. But she's secretly thrilled to see more. Together, this big boss with a voracious appetite and the smaller woman who's hungry for his love are ready to unleash their wild sides!