Is It Wrong to Try to Pick Up Girls in a Dungeon? IV

In Orario, Bell Cranel is the only adventurer of the Hestia Familia living here. He is weak compared to the senior dungeon crawlers but he possesses a special skill. As long as he keeps his feelings for the Sword princess Aiz unchanged, he can become powerful instantly. Moreover, with the help of his goddess Hestia, he vows to become strong enough to fight alongside Aiz and protect others!