He is going to get a full robot made of monster girls isn't he?

no not full robot, there are 5 of them , they just made a megazord lol gooooo junk-san

Dammit! I was gonna say that

Isnt that voltron? OH, wait, it has already been done before on a hilarious H manga, except that most of the girls there are robots, when they combine, they turn into other type of girls or a giant robot.