Comprehensive Manga: Salted Fish Check-In

A salted fish traveled to a two-dimensional world and had the invincible ability to sign in, but he didn't want to cause trouble. What he feared most was trouble, so he said He will not take the initiative to cause trouble, because this is his character, a salty person, his character "System prompts, successful sign-in, Eternal Mangekyō Sharingan" "System prompts, successful sign-in, Black Shadow Corps" "System prompts, successful sign-in, free and extremely effective" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.