This is a Mr. Children DISCOVERY tour T-shirt. I purchased it at the live venue. The size is S, and I think it's made smaller than current sizes. I've kept it carefully, but there are a few stains around the neck that I don't know when they occurred. (Photos 4-7) I think this design is not very common now, so I recommend it for those who don't mind collecting it or for use as a T-shirt for remaking. There may be other oversights, so please refrain from purchasing if you are concerned.