With One Smile, the Sword Tramples the Mushroom

With One Smile, the Sword Tramples the Mushroom Summary:

It turns out that he and her were both monsters. Under this big sky, it is afraid that there is no s.p.a.ce to hold them.
What is spirit, what is demon, what is immortal, what is mortal?
After expending all their efforts and everything they had, all the two monsters wanted was to gain some warmth from each other.
For love and justice! Little Mushroom! Transform!