Becoming evil makes you ten times stronger, but becoming a demon gives you hundredfold strength - Chapter 31 - 29: Tossing and turning with thoughts of the fleeting years, a furrow of the brow, a smile, a charming look.

“Impossible… Why are you not following my orders!? Clearly I sucked your blood, why!?”

On the very first day of high school, the youth subscribing to the philosophy of “absolutely ordinary everyday life,” Kujou Hisui, encountered disaster head on: He was attacked by Rushella Daamu Draculea, the vampire who had lost her memory. Rushella was greatly intrigued to find her vampire powers ineffective against Hisui. Not only did she make Hisui’s home her own, she even enrolled in his school to stick to him–

Hisui had no choice but to help Rushella regain her memory. But before one crisis could be resolved, many more had risen. With tempting advances from the mysterious Sudou Mei, and kidnapped by the girl from the Supernatural Investigations Section in search of Rushella, Hisui’s ordinary life has been replaced by its complete opposite, drama–

Romantic comedy and supernatural action in a school setting!

An inexplicable danger lurks within the harbor, where numerous containers emit a pungent stench. Suddenly, crew members fell ill and began to wildly attack other people. The text that appeared out of thin air told her that this was a survival game.

Fu Anan thought that it was just a dream, and that she wouldn’t be affected by it once she woke up.

It wasn’t until the game told her: She would die if she didn’t follow the rules of the game. She would also die if she didn’t survive for at least thirty days in the game…

Unknown danger on the cruise ship; An isolated island that suffocates people; creatures inside the fog; Floods that engulf everything; Epidemic with no cure; Constantly collapsing lands……

How should one survive in various natural and man-made disasters, and in environments where resources are scarce?

- Description from Novelupdates

When the female support (cannon fodder) slept with the villain, they all had miserable ends.But what about when the female support changes to Xue Xue?The ending naturally becomes different.