Satsuki no Sora

The people that are infected with the maka's sprout, are fated to feed the flower until it blooms, which ends their lives.
The maka -humanoid demons-, carrying its own sprout, are chased by Satsuki, and the maka known as Blue Rose greets Satsuki as a "Hero". What will this encounter bring...?

(Source: AQUA Scans)