In Another World with My Smartphone, Vol. 14 (manga) — Patora Fuyuhara

Let's give a big hand! Time for a meeting of the wives-to-be! As 13,169 Phrase appear, Touya starts panicking. How can they possibly destroy so many strong enemies…? Meanwhile, back at the castle, the former king of the Knight Kingdom of Lestia -- the only adventurer other than Touya to hold a gold-class guild card -- comes to visit along with the princess, Hildegard. But somehow, it turns into a duel between grandfather and granddaughter?!