Part 1:

Reexperience the tale of “Petals of the Wild Snow Moon ~Faint, Fluttering Snowfall~” in a series of side stories told from the perspective of Kiichi Kusakabe.
Will the truth behind Kiichi’s transformation... finally come to light?!

Part 2:

Two months have passed from the events in the previous part.
The baby Yukina was pregnant with that she believed had been killed has, in fact, safely grown into a healthy baby.
Kiichi must have failed to perform the technique he had used on her...
But how could a gifted ninja like Kiichi mess up like that? It seems unfathomable.
And how could the serious and kind Kiichi do something so insane?
The truth has to be out there somewhere...
With this in mind, Keiji sets out, as the master of the ways of Kusakabe-ryuu, to uncover the truth about his brother.
That’s when Keiji encounters a woman he has met once before... in bed.

[From Johren]