This episode hands down my favorite, except if the last two has better writing than this. We finally explored Ai's backstory, and it left my jaw on the floor. I really like how it tied with the ghostly appearance of the boy, and why Tsugumi has a connection with Ai all this time. I feel why Ai act the way she did, feeling like her mask broken in some way. And this episode ended in a cliffhanger, which made me very excited for the next one too!