there's a couple.
1. Crazy First Love - comedy with sad finale but happy
ending. The lovelorn gets to be with the girl until she dies
2. There's this young amn with his son. the boy loss his mother
but was told by dad that she will return when it rains. True
enough, a woman appeared an looked like his mum except she don't
have a memory. The end she became his mum
3. This comedy with RA rating (only minor exposure) about a boy
with a "Rainbow ball" sickness. That is he can only have sex 7 time
in his life time only. Each time only a colour ball will release.
There are some japanses av actress in this show but
warning...little exposure only.Anyway, it was a happy ending as s
the cure was true love!
let me know the name for number three please. 
