I Became the Youngest Summoner in the Strongest Guild - Chapter 71

What would you do if you could control and use your Karma?

“The ocean took everything from him—his memories, his past, even his name. When Eddy opens his eyes, he's met with unfamiliar faces and a world that no longer feels like his own. Rescued by Mr. Dand, a kind stranger, Eddy finds refuge in his home. As he navigates this new life, he develops feelings for Artur, Mr. Dand's son. But the past never stays buried. As Eddy's memories begin to resurface, he must confront the truth about his identity and the life he left behind. Will he still want that life back, or will his heart remain with Artur?”

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy