yes maybe you're right ^^ I see love everywhere now as a yaoi fan (づ ̄ ³ ̄)づ but didn't they had sex together ? It's true it wasn't shown but wasn't it implied ? and Yamato really treasure Ai... and he say he was there by coincidence at the beginning but maybe he really wanted to save Ai
Do you think that yamato-san loved Ai ??
I think it was the case (⌒▽⌒)