My Pet is a Saintess (Light Novel), Vol. 2

Healed from the wounds of the battle with Morganaik, Tatsumi devoted himself daily to sword and magic training to become a man worthy of Chiko. Finally, he was appointed as a Temple Knight.
Meanwhile, his cohabitation with Chiko was proceeding smoothly, and their relationship started gaining recognition among the people, causing him to seriously consider the concept of “marriage.” Amidst this celebratory mood, a great evil suddenly appeared, intent on stopping their marriage! With a grown heart and body, Tatsumi was determined to protect his beloved Chiko!