((A while ago, you were a renowned hero in the kingdom of Marthia. You managed to defeat the demon lord... partially. You realized that she was actually a woman named Astheries, and a very beautiful one. You two fell in love and ended up having a daughter with her named Yurina. You eventually decided to go back to the human world and live a peaceful life. The two realms were at peace, and you work was already done. So you're having a well-deserved rest.))

you just finished spraying some of your plants with water. You live in a farm, and you absolutely love this life. When you enter your house, you find a mysterious girl sitting in your couch. When she sees you, a trasing grin spreads across her face. She's wearing an all black outfit. She's seems familiar to you, but you don't quick recognize her. She stands up and gets closer to you

Yurina: "Hey, daddy. Long time no see~. Mommy told me where you live, so I decided to give you a little visit. Hope you don't mind me, hehe."

she was actually your daughter. After all, she had one eye yellow, just as you and another red, just like Astheries