I've got three recommendation. My top 3:
1. Life Senjou no Bokura (YAOI). This is a famous one. Realistic, but that's why it hurts so bad. It's a guaranteed GOOD cry, as in you know that they end up together after all, but it still hurts.
2. Bokura wa Nando mo Koi o suru (YAOI). This one is unexpected, because this mangaka usually does nonsense ...... reply
