THE ZOMBIE SYSTEM - Chapter 16 - 15: Former Friend

Xia Yan passed through to the world of Bleach and became an eleven-year-old boy. He was rescued by Renji and Rukia in the Seireitei, and he was studying at Shin’ō Academy, and he was a student of the same class.
He is a top student of the Shin’ō Academy, and he is vying for strength by various teams. In the end, he has entered the first team of secret mobile maneuvers.
He will use punishment to kill every person who tries to threaten the martyrdom and protect his loved one.

- Description from Novelupdates

Yi Feng, who was terminally ill, was reborn in the year 2000. In that year, his childhood sweetheart and school beauty Gu Muxi turned 18.“Yi Feng, lend me a pen!”“…Didn’t you just borrow one yesterday?”“Yesterday was yesterday, today is today, things change, don’t you understand?”“…I’m convinced, alright, here you go.”“Yi Feng, tear off a piece of paper for me to use!”“…Why tear mine? Don’t you have any?”“I do, but I don’t mind tearing yours.”“…You really have a way of thinking! Fine, fine, here you go.”“Yi Feng…”“…What do you want to borrow now? I don’t have anything left.”“Hmph, lend me your hand for a moment!”“…What for?!”“Nothing much, I just want to hold my boyfriend’s hand.”“Huh???”This is the daily life of a romance between childhood friends, filled with social awkwardness.A story full of sweetness, without any melodrama or heartache.Welcome aboard!~

“But he is a good man,” she argued to see his eyes narrow at her words.

In a future timeline, the earth was visited by a species known as the Slarkovs.
Having lost their home planet and in search of a new one, earth was the next habitable planet for them.

Humans and Slarkovs made a deal with each other in return for the Slarkovs living on earth.
The Slarkovs traded their technology and knowledge for a new home.
They were similar to humans except for some of them who had slight differences so fitting into the society wasn't a problem.
Over the years Slarkovs and humans began to mate with one another and reproduce offsprings.
This in turn created a new species known as the mixed-blood.
Centuries later mixedbloods could tap into their bloodline and perform unimaginable feats.

Gustav born into an age where bloodline determines everything, struggles to fit with a useless bloodline.
His bloodline only grants him the ability to change his hair color, destroying his hopes and dreams for a great future.
His fate is turned around when an unexpected situation leads to him finding a system that grants him the power to unlock and upgrade bloodlines by completing quests but he's baffled by two quests with a five-year deadline. Success will grant him unimaginable rewards...
But only one thing awaits him if he fails... Death!

Follow Gustav on his interesting journey filled with unprecedented adventures, danger and death, maybe?