Harem of the Dead: Into The World's End

If the world suddenly changes while you are in your sleep, how would you react to it? Leon is a young man who was deemed as ordinary, however, his connections and past experiences say otherwise. One morning, he was left with the front seat to the world that became merely the shadow of its former self. People have turned into flesh-eating monstrosities, otherwise known as undead, and their numbers continue to grow. As the world was taken over by such monsters, Leon only had one goal: that is, to survive. But he wouldn't succeed by just himself. He needs to gather companions and comrades, build relationships with them, and form unbreakable bonds that will put him and everyone on edge above the others. This is a story of the end and what came and will come after it. (↓Disclaimers Below↓)

*Crossposted on RoyalRoad*
*Reading the author's thoughts in each chapter can diminish your seriousness. you have been warned.*

*Parents Strongly Cautioned*
*Excessive amounts of swearing.
*Dark themes such as death of many kinds.
*People get eaten, most of the time.
*Borderline R-18 stuff.

Disclaimer:
*Although this is a harem, it will be a paced romance. Where every girl will have their own arcs, complete backstories, and character development.
*Perhaps this can be considered as a "weak-to-strong" novel but the characters are already pretty strong at the early parts. What they will develop is their relationships with each other, their attitude to their current situation, etc. Battle strength is included in the developments.
*There won't be R18 scenes in the meantime, but I might post them later as some sort of extra chapter. Still, every time Leon does "it", it will only be mentioned implicitly.
*The setting will use a fictional country that exists on Earth. I am sorry but I am really bad at geography so even though this is harder, I prefer it. For more information, an auxiliary chapter about this will be posted later on. It might contain some spoilers though.
*The story will generally be written in 1st person POV, however, some chapters will be written in 3rd POV. Mainly when they feature the POV of different characters when the MC isn't there at the scene.