I guess the author's planning on extending the story. If he had solved the issue with the MK virus cleanly here it would've been over, but there's still some potential plot threads to take.
For one, the MK virus could mutate inside of Reito and turn him into a different person.
I wouldn't be surprised if Reito lost some of his memories and started behaving differently to the point that the girls want the previous Reito back.
They could also make it so that Reito's immune system fights past this invasion giving him a stronger constitution against the MK Virus. If that happens the MK Virus could evolve around the world and negatively impact the asshole guys and leave Reito as the sole survivor. I'm not sure about this plot thread since those other guys allow for the author to write his rape fantasies w/o dirtying the MCs hands.
They could make Reito comatose, and the girls would have to find a way to cure the MK virus with only the clues in his body.
Bunch of possible plot vectors.
@Dipuc4Life
Seems she wasn't aware of the total implications of what it meant to be an agent to me.
@byterunner
I'd honestly stop reading. His heroines are literally the best out of all the ones introduced, and that's because they're actually able to act as characters since Reito himself's a good person and allows for that.
Imagine just following around a bunch of selfish asshats who just get whatever they want. Plot would honestly just degrade into porn and the female characters would be reduced into just good looking faces.
Not saying this artist wouldn't be able to draw good porn or anything, but I actually like the global politics and seeing the girls fall in actual love when they had no intention to.
Like seriously, most of Reito's girls were willing to just accept him as a man, but as the story has gone on they fell for him really hard. Honestly puts a smile to my face seeing the coldest looking heroine write his name out multiple times on glass with hearts next to it.