soulmate /ˈsəʊlmeɪt/ • noun A person who was made from the same star as you. // Kuroken AU where the last words your soulmate will say to you appear on your skin when you turn 16, and how Kenma and Kuroo learn what this means over the course of their lives // Warning: I do not own any parts of this story and I am not the original author. All credits goes to @cosmogony in achiveofourown

Imagine Yamaguchi's surprise when he found his best friend of nearly ten years hunched over a toilet with his fingers at the back of his throat, followed by the horror and rage of what he was doing. His best friend... He had no idea. But now, it was a personal mission to help him get better. They were in this together now, and that's what best friends do.