No.9693312 ViewReplyOriginalReport
Shin is a replacement for Raigomaru, who could fly. According to Noe, Shin can fly.
Noe says Hiromi can't fly, like the other chicken. The two chickens lived together so it's obviously Hiromi and Shin. The chicken was killed by a raccoon, or Ai, if you will.

So ending = Ai kills Shin for ultimately hooking up with either Noe or Hiromi.