Mouryou no Hako/YMMV

• Awesome Art
• High Octane Nightmare Fuel: Several. The girl's head in the box is disturbing to the Uncanny Valley level.
  • The whole reveal about Kanako's eventual fate.
  • And in the last episode:

Sekiguchi: Kubo has been here all along...

• Moral Event Horizon: Kubo was always off his rocker, but seeing Kanako inside the box was what sent him right over the edge. Mimasaka crossed it during WWII, and both Sekiguchi and Kiba come very close to doing the same.