Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 2 - 2-7. Demon Return

[Previously titled “The Queen is Wed”] By accident, Mo Shu bound herself to a system that demanded she court death daily in order to survive.As the malicious supporting character, her first task was to make the overbearing CEO despise her, while also playing matchmaker between the main female character and him. When necessary, she would offer her own face for them to crazily slap, assisting them to marry so she could make a perfect exit.Thus, Mo Shu, in her struggle to survive, spent every day tremblingly courting disaster in various ways. Yet, accidentally, she somehow ended up marrying the man she adored. Now, where did she go wrong?![Not a fast-paced traversing story][Crazy pampering + exhilarating plot]

He was supposed to transmigrate to a magic world, but due to an accident, he ended up trapped in a massive library. The system assigned him a task: for every book he read, he would be rewarded with mana stones, until he finished reading all the books. A trillion years later, Daniel finally finished the last book! [Ding, detecting that the host has finished the final book. Calculating system rewards.] [Ding, reward calculation complete. Dispatching rewards. The total number of mana stones the host has accumulated: 99999999...9999.] “Damn, am I that rich now?” [Ding, detecting that the host has completed the task. Loading world...] ... Goddess of Fate: “Daniel, my divine realm needs expansion. Could you sponsor me with some mana stones?” God of Storm: “Daniel, the divine punishment is about to descend. Could you lend me some power to help me get through it?”

Hello, 1983! I am back!

My relatives, my partners, my hometown, everything changes because of me…

Readership: 647405967

- Description from novelbuddy

A master assassin transmigrates into an interstellar era.

Other players were responsible for competing in the e-sports arena, while he was responsible for stringing up and beating up the other players.

His sword was hidden during the peak of day, and he was a gentleman who arrived in a flash of light;
As a vanguard of the eternal night, he was the variable between life and death in the world.

“As you know, the Star League’s difficulty levels are arranged in this way:
Paradise < Simple < Normal < Difficult < Nightmare < Hell < [Tyron Odin]”

- Description from Novelupdates