I had a dream and my sister told me to sell it to nexon

So.....I've always wanted to be a game designer so I would sometimes randomly think of scenarios that could happen in certain game. I'm not sure if I'm posting in the right forum as I used to play maplesea and moved to global as I'm not longer in SEA. I had a dream one day and it was related to maplestory so I told my sister and she say I should sell the story to nexon. The version I'm telling you however would be quite different to better suit the actual maplestory style rather than a dream.If anyone wants to listen to the actual dream feel free to ask.It's actually pretty interesting....I think....Oh... Sorry if I'm rambling. 

The story goes a little like this....

 

Millenias ago, in a kingdom full of magic and wonder,there was a dark being hidden deep within the land. No one knew where it came from but one day it escaped. Possessing a huge bloodlust,it started going rampage,killing everything in sight. The king seek help from the goddess which foresees the land. The goddess chose 5 brave heroes to protect the kingdom against the dark being. The heroes trained day and night in hope of defeating the dark being. But one day, while their guard was down,the dark being possessed the goddess's body. With the two beings colliding in the body,the body went into a deep sleep. The kings had the body sealed in a dungeon underground in hope that if the dark being won the battle, it would be sealed in the dungeon. 

 

Millenias have passed and everyone had forgotten about the dungeon. But slowly,the body started moving again. The goddess may be slightly stronger than the dark being after such a long battle in the body but she knew if she did not do something soon,she might lose the strength to continue fighting it. 

 

So this is where the player comes in....

 

In order to prevent the dark being from growing stronger, the goddess to not kill anything but gain exp through healing and buffings. Self healing and self buffs do not give as much exp as healing/buffings party members or summoned beings do. Summoned beings do minimal damage with its attack but usually shield and tank damage when the goddess is in danger. In case you haven't notice, this is a completely support type class. So if your class doesn't get exp through monster, there's no way to actually heal yourself unless you purposely damage yourself right? So...here's how it work, there will be special job quests consisting of helping random adventurers. The npcs are the adventurers in this case. It may be a protecting quest for a certain journey or healing someone sickness. This however, will only be available until first job as the goddess will then deem this method to be too slow as she have to wait for people to actually be in trouble. 

 

There's a lot more detail to it but it's rather hard to explain. I figured I'd just get the idea out there. I hope some of you forum people enjoyed the story.