A Demon Among Healers

After Senju Tsunade lost her brother and lover, and realized her clan had been secretly 'disappeared' by people she once trusted, the last thing she expected was that the supposed medical genius with a civilian background she recruited cared the least about human lives.

What to expect:
· AU so that I don't have to worry about the accuracy of the time period and events that will unfold here.
· MC is a demon, like the demons from Demon Slayer. (Of course, slight adjustments would be made.)
· Story takes place six months after the end of the Second Shinobi World War.
· As for his character, all I can say is that he is a very petty person.