Heh, like the season 1 final episode, this is probably one of my longest posts as well. My final impression of this series is noted at the end. =)
Episode 12: “The Ark of Stars” (series finale)
SUMMARY: Suou finds Shion knocked down on the ground in a room inside the Gate. Shion says it’s because he paid the amount necessary for his remuneration, then asks Suou to take him outside because he wants to see the moon. Yin, who’s clad in black, is humming a creepy tune while sitting on a rock in a flowery field, surrounded by a bunch of observation spectres (and contractor spirits?).