Isekai Hoikuen wo Hirakimashita ~Fusei Skill 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 contract with fellow deredere little spirits who have great power or something like that!?

(from Gardo Comics)