What do you do when you suddenly find yourself in another world with no way to defend yourself?
First, survive the hands of all the powerful big shots. Don't draw their attention.
A certain leader: So you're Hoshinoya Guoka. Want to join us?
Next, don't provoke a certain walking pile of black sludge or any of the other weird things.
A certain walking pile of black sludge: Guoka~ Want to go grab a drink together?
Finally, live a good life.
Theme: Work hard, and you'll be able to attain the life you want.