It really shouldn't be that good. It shouldn't. But it WORKS.
Go watch. NOW!
YOU GUYS! YOU GUYS!
At least watch the shorts for much merriment but the first episode of the actual series? THERE'S A CALL OF CTHULU CHARACTER SHEET! And D10s. As a metaphor.
And this is young adult fiction in Japan? I may have to reconsider learning Japanese.
Fair warning - the shorts are Spaceballs level self-aware and vulgar - just without the naughty language.