I'm the Hero, but the Demon Lord's also me - Tatsuya Endo and Akiyoshi Ota

 The fourth and final volume of this ecchi yet hilarious manga, as it reaches an epic conclusion to the story.

Including of course the necessary amount of oppai...

Yuuma, now armed with the sacred Sword and the Demon Sword, still faces off to Carina.  He is no match, even when Ruri, the reincarnated Moon demon general, arrives on the scene.  Unknowingly, he fuses the swords to a huge blade and defeats Carina with a technique that fires up her erogenous zones.

 

Back in the house, princess Alfin is send a succubus cursed set of BDSM clothing, while Lavinia receives a gown that turns her into a proper maiden, and the two start to hook up.  Ruri seeks out Yuuma in the meantime, challenging him and the two bearers of the swords to a fight.  The youngest sister of the princesses intervenes however.

The mother's of both Alfin and Lavinia arrive at Yuuma's house, and when the gang comes back they explain the need of why Yuuma finds himself in this situation.  The girls decide to take matters into their own hands as a result.

Seven years later, Yuuma comes to visit his dad from the other world, accompanied by the girls who all carry his offspring...

So this was a jolly good fun series, and I enjoyed reading it for certain.  Now, let's hope this gets animated as well some day gnahgnahgnah...