From Asclepias Scans:

Park Min Gyeom is a human with a disease that makes him produce excess blood. Kim Chun Sam is a half-vampire who needs blood to live. So begins an unusual symbiotic relationship between "predator" and "prey."

Note: This series contains additional (optional) 18+ scenes.

In this world, every child is born under a god. Some gods are weaker than others. Some gods are stronger than others.

Children born under weaker gods become defunct in society, and cannot attend high school. Instead, they must get jobs after middle school. High school in this world is a place that trains students to use their stronger gods. They have one thing in common: They can grant wishes if the correct price is paid.

Leerang turns back time a day, and pays dearly for it. To reverse his wish, he must attend high school and try to use the powers of his cat god once again.

From Rosa Negra:
A plain high-school girl, Sun-Nam Bae.
She wanted to be free for once in her life, and decided to rebel. But the result of such rebellion.... being a mom?
"Who the heck are you? Where did a ugly pumpkin like this roll in from? You think I was born a man, just to live with a ugly girl like you?"
Bravely standing her ground against a spoiled young master, Chun-Doong Mah, with her child. Chun-Doong and Sun-Nam's tumultuous diary of raising a child.

Though we get closer, the gap that can't be crossed. Our uncertain relationship - warm like pastel colors, but unable to burn hotly like primary colors. This fall is the beginning of the campus couple that'll make your heart race.

Wild's High has a 42-year history as a fighting specialized, girls only, private high school meant solely for the elite. It is also the place that Wild's-League is held: the most popular event in the country and the only place in the world where teenage girls have brutal fights with their lives on the line.

One year the school changed from a girls only school to a mixed gender school. The only male student, Song Jae Gu, has been granted a full 3-year scholarship regardless of grades. Being someone who had to spend every moment either working or taking care of his younger brother and sister, he accepted.

But after meeting Queen, the bloody champion of Wild's-League, drenching her in coffee, calling her a monster, and getting caught seeing her while she was taking a shower... his scholarship could prove fatal.