My starting summon is a small skeleton - Chapter 329 - 326 Lu Haikong Missing

High school student Mikoshiba Ryouma was summoned to a different world in the middle of a war. Sensing the malice from the one who summoned him (a summoner of the O’ltormea empire), he uses his martial arts to run away, killing important people of the empire during his escape. After the escape, he rescues two twin sisters from the hands of thieves. The sisters who can use magic, swear to serve him as subordinates. Thus, Ryouma begins his journey on the path of the supreme ruler.

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

The schizophrenic and bullied middle schooler Lee Jin-woo is about to start high school, but just when he thought his biggest worry would be finding a way to avoid drawing attention to himself, a virus outbreak occurred on the second day, plunging his school into a nightmarish hell, a setting straight out of a zombie thriller movie.However, while he was trapped in this come-to-life zombie horror-flick, not only does he have to think of a way to survive, but he also has to grapple with the fact that this virus outbreak might have been caused by his careless mistake from earlier in the morning.....A rewrite of 'Apocalypse: Apparently, I Can See Zombies'#Story based in South Korea#Story based on South Korean zombie thrillers#Story best read at night#Story best read in bed#Story has plot twists#Story has irredeemable villains# Enjoy the story :)

After being rescued from the perpetual life of slavery as an Arcane Vessel, Theo is given a choice: To continue with his sad and miserable life, or to join a group of Mercenaries called The Ak’ashi Guild and change his life forever.Upon choosing the latter, he must now go through immense challenges and learn even more truths about the world than he ever thought existed.... All while doing his best to survive in the current age—the Arcane Era.Tags: Fantasy. Action. Adventure. Magic. WeaktoStrong. Romance. NoHarem. SliceofLife.