MTL - Super Dragon Slaughtering System - Chapter 4391 monster?

Reiji Saeki, who lives in the north eastern countryside town, lost his life in an accident during summer vacation. ……But before he knew it, a mysterious ball of light hovered in front of his eyes in a world of whiteness. That ball of light was a magician from a parallel world, and is looking for a person qualified to inherit the magic they had created to prevent it from being lost. Reiji, who rode on that suggestion, now lives in the parallel world Elgin, with a new body and powerful magical power.

After 20 years of dedicating his life to opera ever since he had quit the performing arts high school, he had failed at an interview. Losing his motivations, Jo Yunjae depended on alcohol to live out his days until one day, he had been sent back 20 years in time, to the day before his high school admission.

This novel is also known as Long Live the Mad Wife!

Daughter of the Feng Family, born a waste. Forced to marry a fool in an attempt to expel evil influences. When the first killer from the 21st century possessed this body, the sky and the earth surged. She was indifferent and cold-hearted but she let her guard down around him alone. She thought he was a pleasant sheep but didn’t expect him to be a gray wolf in disguise!

- Description from Novelupdates

When the Chinese athlete laughed that video game championships existed, you, as a professional e-sports player, should use your size 42 shoes to measure just how long his smug face is!

When parents, relatives, friends, and all of society squint at your gamer profession as improper, all you, as a true lover of e-sports, can do is to show them a unyielding view of your back!

Have you ever imagined that in four years, e-sports would be one of the events on the Olympic fields. A hair-raising showdown that combines hand speed reactions under a second, great coordination from a five man team, and the ultimate limits of the human response time– –it is the video game competition! Let the enthusiastic followers of the world yell ‘Demacia’!!

- Description from Novelupdates