Start in DxD as Motohama: Leveling Up in Another World - Chapter 17: Encounter

As a good-looking Beta with a good family background, Duan Jiayan has lived a smooth sailing life for more than ten years, until he met Lu XingCi in high school.

Lu XingCi’s family situation is better than his, he is taller than him and plays basketball better than him. Needless to say, his grades are a whole tier above Duan JiaYan’s. Even his friends can’t help but occasionally praise Lu XingCi.

Most importantly, every girl that Duan JiaYan has set his sights on, all admitted that they have liked Lu XingCi for a few years already.

Since then, Duan Jiayan has never thought well of Lu XingCi, till the day he received his new medical report. He is a late-blooming Omega, and because he became an Omega this late, it came with dire consequences. Now Alphas will feel the need to beat up other people whenever they come near Duan JiaYan. He himself is now allergic to every Alpha’s pheromone, except Lu XingCi’s.

*

One night during a self-study session, Duan Jiayan became extremely uncomfortable and ended up asking Lu XingCi to bite him and leave a temporary mark.

After finishing the bite, Lu Xing asked: “We Alphas have very bad tempers, now that I’ve bitten you, are there any rewards?”

“Why don’t you…” Duan Jiayan tentatively asked: “Be a little more generous?”

“Sure,” the other party kneeled slightly and tilted down his head, exposing his white neck: “Then you’ve to also bite back. Once you do, I won’t make a fuss anymore.”

Duan Jiayan: “…”

- Description from Novelupdates

Xuan Yi was transported into the fictional world and became an elder of the Black Sword Sect! The moment he entered the world, he was at the Sea-Splitting Rank!

At Elysia's first meeting with the crown prince, her future fiance ended up punching him. In this way, she violated her first law of survival.

Elysia's three rules of survival - First, Stay away from the main couple of Adam and Eve and make sure they end up together. Second, never fall in love with anyone and keep yourself safe. Third, no matter what happens, make sure you are never caught in any act. Only then will Elysia be able to survive past her death on her 18th birthday.

Ever since her birth, Elysia Raffle knew a few secrets of this world. First, the world she had been born in was a book and Elysia was the villainess in that book. She was destined to be slain by Adam on her 18th birthday and the day of their marriage.

Elysia needed to keep a distance from the main couple to avoid that fate. But how did she do it when she was engaged with one of the main parties and the other refused to leave her alone?

Now Elysia needed to do everything possible in her power to ensure that her engagement with the crown prince was broken and the main couple ends up together.

But it was easier said than done.

In the 21st century Earth gave Birth to greatest genius ever. A genius who Master myriad of arts. Medicine to Engineering. Mathematics to Micro Biology. Weapon Designing to Environmental control. Music to Painting. Dance to Martial arts. He mastered Everything.