Offer Flowers to You -Kinsenka-

Someone whispers at the bottom of the heart.
—The human heart is made of pain.
Indescribable sorrow—
A love that should have no form—
Turns into an invisible pain, stabbing straight into the heart.
That is why life (existence) flows, and the cycle of reincarnation never ends.
...A boy who has never known the pain in his heart since birth, Tachibana Sai, day after day
silently eradicates, reaps, and kills the malice aimed at his one and only cherished little sister.
In this increasingly dull life, he meets a girl who hides herself skillfully, as taciturn as a doll... Akane Matsuri.
A boy who has begun to tire of life encounters for the first time in history the "pain" that pierces his heart.
At the intersection of the dead and the living, in the twilight-bound gap, stands an apartment that has been there since long ago, named "Mumeiso." The boys and girls experience a strange life together.
"A cold-hearted boy who feels no pain in his heart"
"A girl with no friends, only loneliness"
"A girl who is not good at dealing with people but is kind and gentle"
"A girl with ambitions and sharp words, but who takes care of others"
"A man who thinks he is the cutest in the world and is extremely narcissistic"
"A troublesome woman who destroys everything with power beyond comprehension and calls herself the strongest"
"A boy whose body cannot feel pain from birth, with a delicate heart"
The boys and girls live together, fight against the strange called "curse,"
learn about the hearts they never knew, and keep growing.
—The human heart is made of pain.
If only this "pain" could be protected.
If only the world could be gently, quietly destroyed.
...Even if it means returning to beasts, it is worth it.
That is why pain weaves the human heart.
Life (existence) shines—life (heart) flows, and the cycle of reincarnation never ends.