Sieg is an adventurer with an incredible defensive power, and he always uses himself to attract the monsters' attention to assist his teammates. However, the party leader just focused on offense without realizing Sieg's intention, so he kicked him out. After Sieg left, the team repeatedly failed multiple quests ... At the same time, Sieg took the position of gatekeeper at the Royal Capital. Thanks to his defensive power, he was quickly promoted to division captain. His subordinates included a carefree big-breasted Swordswoman, a perverse freakish girl, and an Archer with an erratic temperament. He and the girls started slowly gaining the trust of people around them!

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 in spirits who have great power or something like that!?

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

- Summary from Gardo Comics

The youngest A-rank adventurer, child prodigy Kaiser, finds three babies who were the only survivor of a destroyed village. Then he decided to give up his job as an adventurer and raise them. Over time, the girls grow brightly and show exceptional talents in fencing, magic and management. However, these girls also seem to love their father, Kaiser!

Orignal webnovel: https://ncode.syosetu.com/n2223fo/