I'm trying to find this Dragon Ball Z story. It's about Mirai Gohan coming back to the past with Mirai Trunks. M Trunks is not yet a super Saiyan (because Gohan didn't die). Pan is alive, but Future Videl is dead. Gohan has a mental disorder and had Future Bulma put a thing in his neck to give him his medicine to keep himself sane. M Gohan used to be a serial killer until a child died and he made Bulma put the thing in his neck. I can't remember the name of the fic or even the author. I know that there is a sequel as well where Past Gohan is in highschool and M Gohan with M Trunks comes to visit.
