Oh for the love of god, this is so interesting I can't sleep at all. On episode 14, half way through. Feeling transmission is so far the best test for the five of them.
Edit -- Yea, this is the best twisted personality, behavior and emotion I've experienced. Plus, the depth and confusion was hard to solve until episode 15's title came, and half way through I understood what everything meant. And the love triangle is freaking amazing.
Damn this is really good. On episode 17.