Every living creature in this world has it's own abilities and supernatural powers.

There are two types of this supernatural powers.

One is called Ki release where a person removes his/her physical restrictions or our body limiter to release this kind of energy from the body and they are called a warrior.

Allowing them to do something that a normal person's body can't do.

For example jump from the top of a building with a 100 floor and land with its own feet will not give any huge damage or without dying from it.

It unlocks inner strength and our inner sense for us to use it for combat  with a brute strength and inhuman speed.

They also have a very solid build after releasing the Ki.

This can all improve by training the body and by Leveling up.

But in Ki release, there are also some people who can use their Ki for controlling elements.

They are called Esper the special class among the Ki users.

They can control elements like Mages without gathering Mana then use it but they can only control a single element and can only enhance this single type of element.

But can use it without any cool down and Infinitely the only thing you should think when you are a Ki user is your stamina because this is the most important thing in Ki user because without you will not be able to release your Ki for combat.

The other one is called Mana Gathering where it gather natural energy and release it and they are called mage.

Use it for body enhancement or make a spell with it.

Like example gathering natural energy in your right hand then condense can now allow you to create something within your right hand, make it explode, make a weapon or other within your imagination.

But limited depends on the Mana that you can absorb or your capacity of gathering Mana within the body.

You can use it to control elements like the flame, water, electric, wind, ground, etc.

Create a lot of spells with these elements but there are only 2 types of an element within a normal magician and 3 types elemental Mage is considered very special because they are very rare and precious like Espers from the Ki users.

This they give them special treatment just for 3 element because if you already master a lot of magic in your 1st and 2nd element you can still create a new one by mixing these two to create a lot of spells and with the 3rd one will be a lot to mix and maybe more powerful than the dual elemental magician and they are called High Mage.

In a magician in this world, they measure them here by the number of his/her spell and how powerful it is.

And the last and does not consider to be special but only a Trash in the eyes of others but only happens in every hundred years in a single person.

An Exception Zero someone who can't release limiter or absorb natural energy.

An Exception Zero is what you call the lowest of the low or Trash from the perspective of some people.
Beating a Mage with only single element control or a warrior who can't break his/her limiter that they even call commoner's.

I think you can imagine the treatment they do to them.

Well, I am one of the most misfortune people who has this but I won't give up on becoming strong even without relying on Ki or Mana.

I'll become strong and I'm still lucky for my family who still support me even for being like this.

In this world, there is a dungeon that they call The Tower of God.

Where if you achieve getting to the 100th floor you can meet the Goddess and grant your wish but only the 16th floor has been achieve to discover and every single floor has boss to defeat just to proceed to higher floor and every single boss can only be defeated by 5 group of the same level of the floor.

Like 6 level 1 Mage/Warrior or 4 level 2 Warrior/Mage can defeat it normally and still difficult.

But if you want to defeat them single handed or without any companion then your level should be higher +3 or +4 than the floor your challenging that's how hard to defeat a single floor.

Leveling up is very hard normally it takes 3 months for someone who do the extreme and 1 year for a normal training just for a single leveling up and depends on the monsters you defeat in the dungeon.

The road to my adventure and fate as an Exception Zero (not anymore) will start from here.

[Translation: He Just want a Harem so he want's to become strong Adventure (Is it wrong to Pickup Girls In a Dungeon).....joke]