I'm in love with a demon ~INOAOI~

Inosuke, known as the Mountain King, fell in love with Aoi Kanzaki.(In this story, Aoi is a hashira, Ice hashira. The Ice breathing style was created by herself). After a tragic accident, she disappear for a very long time. Inosuke lost his signature grin and wasn't enjoying life anymore. (Every hashira is alive, even...