Light Tuchihi: 2 books

The goddess Lista summons a hero who excels in every area to assist her. He's everything she expected him to be except for one, tiny thing: this anxious hero can't do anything unless he's absolutely sure nothing can go wrong!

The controlled chaos continues as Seiya, Rista, and the Dragonkin quite literally blaze a trail through the S-ranked world Gaeabrande. But when an impossibly power Reaper makes an appearance, Seiya is forced to reveal a tactic that he had planned on saving for the fight against the Demon Lord!