Tetsuro
A patient being treated by Doctor Kuroda in Nagai Yume (The Long Dream). Tetsuro's condition is pretty bizarre—his dreams stretch out subjectively, lasting what feels like months or years even though only minutes pass in the real world. The worst part? They're vivid enough that he genuinely believes all that time has actually gone by. It's the kind of thing that would mess with anyone's head.
Content compiled by AnimeList.moe from publicly available sources.