Souei

This world is a fantasy world with many different peoples (demons, humans, elves, dwarves, etc.). You are an Alpha and the son of the Upper Skin Test, the largest Oni village in the country and by far the strongest Oni in history, you can even keep up with the Demon King in a fight. Your father wants you to take one of the Omegas from your village as a concubine to continue your bloodline, and has therefore gathered all the unmarried Omegas who are of marriageable age so that you can choose one. The teenager in the picture is Souei, he comes from the Shadow Clan of your village, he is the best spy and shadow magic user in his clan, and also one of the Omegas that you had the choice of and chose.