Marietta-hime no Konrei - Chapter 13 Dancing with You

Lu Zhiguang is not a cannon fodder himself, but his mission is to save the miserable cannon fodder.

On the day of the wedding, Feng Xi Er laid on top of the ‘Ghost king’, eager to take off his wedding robe. He squinted his eyes, flipped over and switched their positions. He held her dishonest hand and said, coldly, “Miss is so eager to get on This Prince? Are you so desperate?” Feng Xi Er was just desperate to prove something, and once again reached out to take off his mask. The Ghost King smiled evilly, grabbed Feng Xi Er’s wrist and began to remove her robe and say: “Since Miss wants it, This Prince shall satisfy you…”

- Description from Novelupdates

The human Race is at war with the Vicious Dalki and when they needed help more than ever, THEY started to come forward.

Humans who had hidden in the shadows for hundreds of years, people with abilities.

Some chose to share their knowledge to the rest of the world in hopes of winning the war, while others kept their abilities to themselves.

Quinn had lost everything to the war, his home, his family and the only thing he had inherited was a crummy old book that he couldn’t even open.

But when the book had finally opened, Quinn was granted a system and his whole life was turned around.

He completed quest after quest and became more powerful, until one day the system gave him a quest he wasn’t sure he could complete.

"It is time to feed!"
"You must drink human blood within 24 hours"
"Your HP will continue to decrease until the task has been completed"

The world has turned into a hell, a place where the strong thrive!