Youkai Gakkou no Sensei Hajimemashita!

These shows start in a very similar way: a new timid teacher gets assigned to a class of full of mischievous students, who start to pester the new teacher. Even though Mitsudomoe does not contain any mythology, both shows have a very similar vibe in them. 

They both have that similar sort of absurdist, comical, jokes, with a caste of characters with similar sort of, extreme personalities. If you liked the style of jokes in one, I think you would enjoy the other. 

School-set wacky comedies where a human has to attend school with other people that aren't humans, in Seton the human is with anthropomorphic animals and in Yohaji the human is with youkai. There are pointers within both where you learn more about the species there, one regarding different animal species and the other on youkai. Main difference is that Seton's human MC is a student whereas Yohaji's human MC is a teacher, also that Yohaji leans more towards gag humour and Seton is more ecchi oriented within its comedy. 

Two 2 season-cour anime with a male MC encountering youkai and coexisting with them. Premises are different in that one revolves an apartment full of youkai and the other is a whole school within a district full of youkai, their genres do differ a fair bit but are full of fun everyday activities living with youkai, every so often touching upon serious stuff but generally characters in both don't face many issues/hardships. Youkai Apartment is more slice of life and pretty tame and quaint compared to the more comedic gag humour nature of Youkai Gakkou. They both also have Tomokazu Sugita playing as amusing characters in both if that's a big bonus to anyone as well. read more