Comprehensive Comic: Becoming a Heroic Spirit from Scratch

I was reincarnated into the comic book world and lived a comfortable life until my second year in high school. I wanted to spend every day happily with the heroine of the comic book, but I never thought that the system would suddenly appear and tell me that this is actually a dangerous and terrifying world... Ghouls, evil spirits, angels, demons, monsters... So he was forced to become an Assassin and began his own path to purge. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.