From Renta:

"Story

Being invited to join a coworker for dinner has never been so steamy!

Uru's main joy in life is eating as much food as she can find.
On the other hand, the private life of Nokyo, her handsome colleague, is so mysterious that no one has ever seen him eat!
Although many of the women at their company have targeted him for his good looks, Uru's been content to casually admire him from afar.

But, she's in for a shock when she catches him after hours in the break room with a female coworker.
In addition to witnessing the embarrassing scene, Uru quickly realizes that Nokyo is actually a beast spirit who feeds off human energy from activities in the bedroom...
Now that Uru's seen his true form and interrupted his meal, she's next on his list to gobble up...!"