Isekai Hoikuen o Hirakimashita – Fusei Sukiru de Saikyou Loli Seirei-tachi wa Deredere desu

Oliver, an adventurer almost in his 40’s received a certain mission in regard of his earnest personality. That mission is to bind a contact with fellow deredere little spirits who have great power or something like that!?

Thus, the fellow spirits gathered and the new life of Oliver as school principal begins–!!