Ok, this is a beginning:
One day Choco with Mog spend they time at Color Plains. Then Mog has received a letter from his old friend Cid. In that letter, Cid request Mog with Choco came in Kweh!!! Village for very important business. When they has come, Cid has acquainted them with Shiroma the white mage.She told them about terrible curse which has captured Chocobo's Dungeon and starts to infect other dungeons, caves, villages and woods. Shiroma has told, that Choco - a chosen one which should rescue their world from it terrible curse. Meantime in Kweh!!! Village a rain and a strong cold has set in...