Evil Angel's Egg

The lord of the sixth realm is 300 years old.

At last, the time has come to make child and carry on his name, which can be done with the same gender if he so wishes.

One night in a dream, he has a revelation.

Having spent three centuries in dismal isolation, this lord who shall make a child with a human will love his kind until death, and live for no one else.

Light romantic parallel world BL school ADV game.

[From DLsite English]