"A world where human emotions become flowers."

Heartbreak, regret, jealousy.

Feelings you could never tell anyone bloom deep within your chest.

Only a very few "young men" known as "Flower-Eaters" can pluck those flowers.

A Flower-Eater (Hanakurai) is a member of a unique clan who can see the "flowers of emotion" that bloom in people's hearts.

Strong emotions—sorrow, love, regret, obsession—bloom as flowers in the chest. If left alone, these flowers cause a condition called "Flower Blight," which eventually eats away at the heart itself.

Flower-Eaters can save people by plucking and eating those flowers.

But as a price, they inherit some of the memories and emotions dwelling within the flower.

Every time they save someone, they carry a little more of another's life on their shoulders—that is the fate of a Flower-Eater.