Bitter stitch Alice

Once killed you turn into a ghost and roam earth for as long as you'd like they say.. but one person in this world has just happened to be able to reincarnate once dead but it’s not to his knowledge, he lives life having no idea. However, the ghosts who have encountered him in his living times knew him personally, and constantly try to get him to remember them before they pass on to the afterlife. Scientists find this out and try to kill kacci to keep this a mystery forever.