Guild No Cheat Na Uketsukejou (Novel)

One day, due to God's mistake, Tomoaki Akinoi's life was accidentally snatched away. Though he gratefully accepted the cheat offered as an apology and reincarnated, he was reborn as a female elf! Then time passed, and Tomoaki now works as the intelligent and beautiful receptionist named Ilya in the Luneville branch of the Guild Association. In a world of swords and magic, her job in the guild begins today. (https://seiga.nicovideo.jp/comic/34128)