I've cried while reading this manga. It's gotten pretty dark, methinks.

While the whole betrayal thing was messed up, Ikki still knows who his family his. Betrayal shouldn't be the end of a relationship, it's just a speed bump. Ringo probably hurt the most.

And now to top it all, Sora straight put Rika is some sort of robot, and it's pretty unclear whether or not she's actually alive or not.