The End of Somachus

"Please save the world." The first thing You Yu does when he wakes up every morning is to look at the numbers on his bracelet. Others thought it was an ordinary terminal. Only he knows that it is the probability of the world's destruction - the initial value is 0.3%. He is a "key variable" marked by a mysterious organization. He can use magic, and there is a weapon in his body that demands souls. The city he is in is one of the last three strongholds of mankind. The surface of the planet has long been covered by strange substances and has never recovered in forty years. Not long after college life began, a blue-haired girl came here from the world of monster hunting and became the president of his club. The numbers on your wrist don't lie - the odds start to rise the first day you meet her. Monsters with blank history and human words, all forces coveting the barrier... When the factors converge around You Yu, as the key factor, is he the destroyer or the savior? Countdown to the end of the world.