My name is Fengge, yes! I was stared at by a little yellow duck and forced to travel to the concave and convex world.
I don't know why, but they thought I was gentle, kind, harmless, and considerate.
In fact, I am the only one who knows clearly. I have no heart at all~
Concept: A girl without a heart realizes the meaning of her existence while traveling again and again in a concave and convex world.