This short story is about a guy named Naoya who had a very fragile body ever since he was born, that results to him not getting out of their house and became unable to make interactions with other people beside his auntie and uncle who took care of him since he was abandoned by his real parents, and because of that the kid starts to develop a feeling of extreme loneliness which ended up with the kid starting to imagine a friend who would play with him and will stay by his side when he was alone.
At first his family didn't give it that much thought, but as time passes Naoya did not even want to get out of his room and more to it didn't even want to interact with other people and that cause his auntie and uncle to make a move they tried all of sorts of things like introducing children to Naoya but he didn't even said a single word to them and just continued to play with his imaginary friend, and that kind of scenario last for almost a year and that make his auntie and uncle dead worried, and finally his uncle suggest that they should just remove Naoya's memory about his imaginary friend, his auntie hesitant about it but she knew that if they didn't make a move it would just be worse so they took a gamble they lied to Naoya that they would buy some new toys for him and brought him to a hospital that is owned by his auntie's and uncle's family the treatment is a success and Naoya also undergo to a treatment to remove his bodies fragileness that lasts for a while, but after it Naoya and his family moved out to far away city to live a new and normal life.
But after a lot of years the memory of his childhood is triggered and is slowly coming back, and because of it his normal life will be affected greatly.