I could have given 5 stars if not for the betrayal. The fact that he willingly did it is impossible, it was such a great plot until then...haa. Even after the fact he knew it was wrong they "broke" up he STILL kissed the other guy! Come on! Weak hearted just left a disdainful taste at the end even though it had a nice ending.
Soshite Boku Wa Tohou Ni Kureru