Thriller Game: A Cleaner Skips Work

[Gong-focused + invincible + shou spoils gong + gong is a supernatural entity]

Siss is an ordinary cleaner known as the "Janitor." After working night after night, he grew tired of the job. Finally, one day, he decided to leave his post and head for the supposedly colorful world of humans.

"Wait! You can't eat that..." The weak, easy-to-bully doctor looked on in dismay as Siss swallowed the SSS-rank reward item he'd worked so hard to get. Then...

"I can't eat you either... Siss..."

Theme: May the world treat you with kindness