Nanomancer Reborn - I've Become A Snow Girl? - Chapter 6: City

With a hideous visage they came to be known as goblins.

During the day, she was his secretary, working very hard with excellent abilities. At night, she was his bedmate, trying her best to please him, and the two of them were very harmonious in bed. One day, this relationship was on the verge of ending. However, both of them had already become deeply involved and had grown accustomed to each other's presence, falling in love with each other. So...

“From my viewpoint, this so-called supreme bastard’s body will serve as a valuable asset to simplify my life.”Dane was a carefree slacker until a deadly virus turned humanity into flesh-eating monsters—his own roommate included. After being devoured, he mysteriously awakens inside a simulated LitRPG world as a hidden extra, far stronger than the protagonist. Gifted with Adaptation and a heavenly beast, he rises through Soul Academy, defying expectations. However, a mysterious hindrance threatens his newfound power, forcing him to fight for survival.‘…One… Two… Three… Wake up!’

To be exact, the female lead is an “older sister” type, amid many beauties and handsome guys, she's no white lotus.Also, it's said that the name of this book is the same as a brand of sheep's milk powder.