Oh man... I thought this would be like the other pool...
After reading the first chapter, I don't want to read anymore.
Summary: 7 pairs of yukkuri (Udonge with Reimu, Marisa, Alice, Patchouli, Myon, Chen, Kimeemaru) have been taking down released yukkuri. The picture shows Reimu pair taking down the final Marisa as part of their training (she dies after deciding to abandon her hat).
The instructor gathers the Udonges alone, and tells them their final exam will start. Each of them has to take down one yukkuri...
Their partner.
The targeted yukkuris wake up in a wild area, and initially confused over where they are, decide to find out their location. Kimeemaru flies up... and is promptly shot down. Chen loses a ear, and the rest panic.
Udonge C refuses to kill her partner Chen at first, but eventually does so after some threatening by the instructor. However, he deems her as a failure, and executes her. The targeted yukkuris start running...