Isekai Shoukan! Maou ga Papa de Ore ga Mama!?

"Life is a shitty game," said Kagurazaka Tsubaki, a gamer who is also a recluse and a NEET, going through the motions of his depraved daily life. For Tanabata, he went to sleep wishing he could live in the game world instead, but... When he woke up, he found the extremely beautiful demon lord "Gücklich Kite" looking him. This is the world of the game Tsubaki used to play! Kite pushed Tsubaki down, saying, "You will be the mother of this country by mating with me, the Demon Lord." Is he about to be taken by the handsome Demon Lord? The forbidden child-bearing mission between a beautiful demon lord and a reclusive gamer is about start!

(Source: Animage Comics Haruto, translated)