Akuma no Houteishiki

"A fun little two volume story about the Demon Astaroth who is being pursued by Beelzebub who wants to marry him. The problem is, if Astaroth give in he becomes a female, which he doesn't want. Second problem is that since he doesn't do a good job as a demon he is constantly running out of energy and transforming into a mini-demon. Of course Beel is always willing to give a little energy to his love. Also features a Lucifer who looks more like a visual J-pop star."