Kitaku Tochuu de Yome to Musume ga Dekita n dakedo, Dragon datta.

Also known as: 帰宅途中で嫁と娘ができたんだけど、ドラゴンだった。, On the way home I got a bride and daughter of twins, but it was a dragon., 回家路上撿到的老婆閨女, 居然是龍

by Waon Fukakutei, Hitsuji Amano

Thanks to my old man doing his best, despite it being on a two-generation housing loan, I was able to get my very own single-family house! As I went shopping on the evening of the day I moved in on my younger brother’s request, I was asked for help by a lovely blue-haired girl. Told it was a kidnapping, I took out the perpetrator with a lariat, and what appeared were actually two large eggs. As soon as I touched them, they split and two baby girls appeared! At that moment, the blue-haired girl called out, “You’re the dad!”