System vs Rebirth - Chapter 37: Progress

In a world where magic rules and human nations fight to survive, a 14-year-old stowaway finds himself thrust onto the frontlines of war. With no allegiance but to his own cold logic, Lugh is forced to navigate battlefields of steel, sorcery, and shadows. What begins as an escape soon becomes something far greater—whether he wills it or not.Gunmage – When spell and steel collide, a new kind of warrior is born.

A young boy genius, Suo Jia, is a water mage who dreams of being a warrior travelling the great and dangerous trade routes to find his lost father that set off on them before Suo Jia was born. Having to look after his sick mother, Suo Jia manages to find a way to solve all their problems, as well as make a name for himself. He gathers nobility, vast wealth, items of great power, knowledge lost to the ages, and exceptionally talented females around him as he plots and plans – preparing to set off on an epic journey that will go down in history as a new legend. However, will others that depend on his powers so much be willing to let him go on such a dangerous journey so easily?

- Description from Novelupdates

For non anime fans- Yandere is extremely possessive girlsIn an open world MMORPG game called Stellaris Fantasia Online, me and my partner we're rising to the top, killing other players, farming loots and so on....But, yes, this partner of mine won't let me play with others.... even with my friendswhy? because she's a Yandere....Its so irritable that I unfollowed her.... well that decision hurts me too, since she might turns out to be a hot onee-san (older woman)But as soon as I attend the class, my homeroom teacher is in bad mood...Why??Just read the title....

Transported to a garbage-filled planet in the interstellar era, Ji You was so poor she was nearly digging the soil to eat, but... the soil was toxic and inedible... With no other choice, she had to lower her standards and pick up trash and sell scrap, such as these beautiful grass seeds that no one wanted. She gathered them and threaded them into beads to sell online.But once she posted them online, someone left a negative review: 'Selling grass seeds? Are you crazy for money?'Days later, this person was pounding the wall in regret: 'I beg you, sell me a grass seed bead, just one! Just one is enough.'Ji You coldly responded: 'Not selling!'And then there's the sparkling stones lying all over the streets that nobody wanted. She picked them up, polished them into bracelets, and sold them online.People lashed out with their words: 'Selling such broken rocks - have you never seen money?'Days later, those same people were crying and wailing: 'I was blind, I was so shortsighted, to overlook such beautiful and pretty stones. I beg you, sell me one.'Ji You spread her hands: 'Gone.'