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

As an adventurer living in Orario, Bell Cranel becomes the only member of Hestia Familia. Although he was very weak compared to veteran dungeon crawlers, he gained a special skill that enables him to become stronger quickly as long as his feelings towards Aiz, the Sword Princess whom he looks up to, do not change. With the help of his goddess, Hestia, and other people who cares for him, he vows to be strong enough to stand side-by-side with Aiz and protect everyone important to him.