This is an idea that came in my mind randomly. Also I will give a short breakdown of the world for it to make sense since it will not be any other anime world but I definitely will use references from other animes.
The World Will be a fantasy world (basically magic or powers exist)
In this world every human is born with a power (that can either be common or unique) which exists throughout their life. More will be explained throughout the story.
The reason for this story existing is solely because there is no good fanfiction of Yuichi from Tomodachi Game. I know he is underrated and Tomodachi game doesn't have a big fanbase but still he's one of my favourite character and one of the best mangas I have every read.
I will try to make him as realistic as possible and true to his character. I apologise for my grammer in advance since writing with a phone keyboard is pretty hard for me and I don't have much time to check for grammer.