Comprehensive Manga: Kill Hyoudou Issei at the Beginning

Living in a different world, I originally thought that I would live my life in an ordinary way, but I didn't expect that a year later the system would be accidentally opened, and I could plunder the origin by changing the plot. "Ding dong, master kills the original protagonist Hyoudou Issei, the source value +13000!" "Ding dong, the lottery consumes 1,000 source points to get the Demon-Destroying Holy Sword Esther!" "Ding dong, consume 10,000 source points and gain super power: Electric Shocker lv5!" Step on the corpses of various protagonists and reach the top step by step! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.