White Mountain Ash

After the Silent Era, gunpowder became taboo and thermal weapons were forgotten by the world. On the island in the middle of the river in the Beichen Kingdom, a dilapidated machine school holds secrets from seventy years ago! Some people want to dig it open so that Beichen can protect himself; some are guarding it, using sniper rifles and seven rounds of bullets to maintain the fragile balance; others are wearing mechas, across the border, waiting for the moment it sees the light of day again. Lin Yuan took over a rusty iron box, a broken robot with a talking cassette, and a drawing with mysterious symbols on it. He didn't know what he had gotten into. And he is just a little guy who only knows how to repair things and just wants to find out why his master died.