Help looking for a shounen ai manga, it was about a guy who lived in an apartament and a g...

Help looking for a shounen ai manga, it was about a guy who lived in an apartament and a ghost child appeared haunting his house. The child has lost his memories and lived with the guy I think the guy tried to search for the whereabouts of the family's child. At the end the ghost disappeared and the guy felt das buenos after a long while after the child appeared grown up because he wasn't a ghost, he was a kind of astral proyection form who was wandering while his real body was in comatose due an accident and after waking up the child tried looking for the guy. At the end they're able to reencounter