I was a 28-year-old researcher in Japan, and before I knew it, I have been reincarnated in a fantasy world. Furthermore, I had a half-spirit father and a spirit mother. An aunt who is deeply attached to father, cousins who are problem children. Girls who cause awkward situations as in an otome. Furthermore, in order to gain the affection of a love interest, a cousin even had a word battle with a king! I am very busy helping humans as well as spirits! And when I find people who are targeting my father, 「I’ll crush you.」 The cheat protagonist deters those who aim at her family. This is such a story.