She's a professional hitman. And he…is also a professional hitman. And she's his target. Caught in a deadly game of cat and mouse, will she fall first…or will he?
As long as hearts exist inside people, there will always be those who suffer.
And then something "strange" enters their mind and causes a strange disease to manifest itself in the body.
The illness, which is called a "mystery disease" is unknown to most, but certainly exists.
There is a doctor and apprentice who fights the disease, which modern medicine cannot cure.
His name is Ramune.
He acts freely all the time, is foul-mouthed, and doesn’t even look like a doctor!
However, once he is confronted with the mysterious disease, he is able to quickly uncover the root cause of his patients' deep-seated distress and cure them.
And beyond that...