MTL - The God of Sky & Earth - Chapter 4 : The child grows up at the beginning.

Vincent Strider was a gun for hire who made a living by killing whoever it was his clients wanted dead. But during one mission, he died in a fierce gunfight. However, death was not the end for him. Vincent found himself reincarnated in another world, facing a floating interface that flickered before his eyes.[Synchronizing Host!][Military System initializing.]Vincent found out that in this system he received, he can summon soldiers, tanks, aircrafts, and even warships! This is going to be exhilarating.

Seventeen-year-old Hajime Nagumo is your average, everyday otaku. However, his simple life of pulling all-nighters and sleeping in school is suddenly turned upside down when he, along with the rest of his class, is summoned to a fantasy world!

“These are my conditions. You have to agree upon them before we can get married.”“Accepted. Each one of them is accepted. Any more conditions, soon to be wife?”“Yes, I want your help to destroy my jerk of an ex-boyfriend.”A sly smile appeared on the lips of the men sitting opposite her.“With pleasure.” How could he let his competitor stay unharmed? He would be having his own fun in destroying the man who had made him taste vinegar a lots of times.“Something as?”Before she could even shake her head, he stood up from his seat and held her hand. “Let's go.”“Where are we going?”“Civil affairs bureau. Any time later and it will be closed.”Xin Mei looked at the man with wide eyes, and before she could comprehend, she was sitting in civil affairs bureau with a marriage license in her hand.****Xin Mei woke up from coma after 3 weeks of long sleep. She faced a brutal reality like every other female lead; her boyfriend was cheating on her with her best friend. Feeling vengeful, she decided to have her revenge.It's payback time.“She snatched my boyfriend; I will snatch her career from her.”“He rejected me. No problem. I will find a more handsome man than him.”“His father made my father beg; now I will make him beg.”And who will help her? Su Yuchen!Su Yuchen believed that a person can fall in love only once and he had already fallen in it. His belief was broken badly when he met Xin Mei. After tasting a lot of vinegar, he could not wait for another second to make her his wife. He could not lose his second inning in love.

To reward Meng Fan for his bravery before his heroic death, the cosmos rewarded him with a ‘system’, sending him back in time to three months ago, alive.

- Description from Novelupdates