もんむすに征服された世界

This is a novel RPG, you'll not be acting as a invincible worrior like others, you'll be mortal. Hell, you are less than mortal. Hoping to end in happiness and be legendary, the MC is at the same time, weak and spineless. 

But one day, a portal opened for appearantly no reason, evils poured in - the devil who wants to rule the world, slime princess that's acutally kinda cute, blood-thirsting succubus, fox of mystery and sexy mermaids. Humans were in shock and had no clue how to get rid of them, the whole world is in chaos.

There's your chance! Go for it! You went into the mountains but recklessly slipped and fell to the bottom of a pit. When you woke up, a sword appeared from nowhere and tell you 'You are the one who's gonna save the world!' 

"But can I?" You wondered. You eagarly turn your sword to the pretty monstress and it turned out nothing's changed. The monstresses were still deadly and killed you instantly.

BUT!
Huh? I thought I died!
What's this place? Why am I still alive?
After died a couple of times, you realized that you cannot die. 

The monstresses had killed you over and over again, but you got stronger in the process. The mankind is for me to save! Charge! 
No! Upon awakening, he finds an unfamiliar sword in his hand.
“Use the LifeSword, and save your world from devastation.”
He hears a voice resonate from somewhere…
Can such a weak young man like himself really save the world…?
Half in doubt, the protagonist takes the LifeSword and challenges
a monster in battle but… his expectations are totally betrayed.

For he is almost instantly defeated, consecutively
reverse r*ped and upon being sucked dry… dies…

All hope is……….. NOT LOST!

Huh? I thought I died? What’s going on…?
That’s right, he revives from the dead!
Even more powerful than before!?

As the prophecy tells, can this young hero (YOU) really fight
against the evil monster girls and reclaim the world for humanity?