From Amazon:
A tale of forbidden love – a demon and a girl
“You are gonna have my baby, a demon baby!” – The demon pursues 17-year-old girl Fubuki…

As a child Natsuno Fubuki met a silver demon.

He told her :
"When you grow older, I'll definitely come and eat your heart"

Fubuki, who grew up,at the age of 17 while frightened of the memory of that demon, had a crush on her homeroom teacher, Shimakage Tone, and told Shimakage-sensei about her feelings and the horrible memory of the demon
.But her teacher said "That is me" and turned into the demon?!

A forbidden love fantasy that depicts the mysterious bond between a girl and a demon that has been lonely for a thousand years!