Kakyoin's Imaginary Friend

(JJBA part 3 spoilers)
(Not 100% is canon, just made up what was needed)

Noriaki Kakyoin had always lived his life as a shut-in. He had no will whatsoever to open up to anyone, even his parents, whom he deeply loved and cared about. He felt that his "imaginary friend" would be his only true friend, and to anyone who could not see him, Kakyoin decided not to socialize with.
But no one could see Kakyoin's imaginary friend, his Hierophant Green that could go wherever he went. Not even Kakyoin was sure of his appearance, but he was sure that he existed.
Despite showing teachers and peers alike his superior intelligence with his high grades in academics, Kakyoin still had much to learn. He believed that a person has one job in life and one job only, and that there were no such thing as roses to stop and smell.
However, Kakyoin began to open his eyes. He started to see how much he wanted a true friend.
But he could not make a friend if that friend could not see Hierophant Green. He never thought he would be able to find someone like that.
But, by fate, he did.

(Cover art is mine)