i will keep it short i am just a fan boy of dr stone so seeing why man was always tickling my brain, at first i didn't wanna read it i read another review which said it was revealing a lot of things that happened when senku and his gang were working. i reed it and just gotta say mr why man isn't man. over all it was worth the read. but dont read it when just staring the manga your brain might blast, read it after catching up to the original manga, a lot was revealed about the characters' and the world. btw i ama pendrive