idk what you're actually talking about, but there's a kind of similar manga about a boy who falls into a time portal that takes him to past and there, he meets his father who's currently 14(-ish, i don't remember) and falls in love with him and then, still has feelings for him even after he leaves the past and returns to the present time.
it's called not equal ( http://www.mangago.zone/read-manga/not_equal/) maybe it's this one?
Thank you but i think not that one...if i'm not mistaken, there's a scene when the mc went outside during storm to find his ghost father, but then he was saved by the another guy who likes him...i'm not sure whether he(mc) drowned or something, but only then he remember who the ghost was,,, and after that, he couldnt see the ghost anymore... It's been so long since i read this,, i'm not sure about the genre anymore,, whether it's bl or shoujo ╥﹏╥
I dont really remember the plot,, but i think this was either yaoi or shounen ai...the mc can see ghosts and there's this certain ghost that accompany? him...and he fell in love with the ghost, but turned out that that ghost was actually his father...i think he saw the ghost after they moved to the countryside...and there's another guy (not the ghost) that likes him (mc),, and he was the son of the guy who likes mc's mother...