Hm... I think Yuuichi might've betrayed to make the team he switched over to lose, in order to let Tenji win, making his own debt worse or even no better. Not sure how he's going to do it, but they're pulling at all these heart strings of Tenji starving and dying of thirst in order to a great plot twist again most likely, something they've shown to excel at.
But honestly, who knows. I just really hope this is the case for Tenji's sake. : ^ (
Man that we know about Tenji's quest for revenge it's makes it even more heartbreaking to watch him starve to death in a cave, but I'm still curious about what Yuuichi is planning. It definitely looks like he'll do the betrayal scenario, but there has something more to it. My theory is that he could be planning to turn the other team against each other or he aim might also be to expose Maria, but those are just something I thinking of so who knows. Either way I'm still on the edge of my seat!!!
I just know Yuuichi has a plan but I don't think Tenji is gonna like it!