First Legendary Dragon: Starting With The Limitless System - Chapter 30: Infinite Gacha

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!~

This is a world where humans, demons and mysterious beasts coexist.

Humans cultivate mysterious qi. Demons cultivate corporeal bodies. Mysterious beasts cultivate soul perception.

A legend says that in the middle of an endless rainforest, there are extremely powerful existences; they are called demon kings.

Some demon kings have a tyrannical corporeal body, some are experts in illusions.
Some demon kings are proficient in magic, some can even move mountains.
Some demon kings are able to sense things thousands of miles away.

These demon kings rarely appear in the human world. Even if they emerge in the human world, they would reincarnate in human form; assimilating with mankind while seeking to breakthrough realms…

- Description from Novelupdates

A side story series featuring the girls of Kyoukai Senjou no Horizon.

It was only after Su Yayan's death that she realized that she was a malicious cannon fodder female character who became a scapegoat in a Mary Sue story.