CMN-199 Nagai Mihina: IBITSU – The Twisted Revenge of Twin Sisters, SM Torture Novel

Beautiful twin sister Mihina has a timid personality she can't control. She's been tormented and trampled by her cruel mistress in a dungeon, forced to crawl from her servant's feet. Now, to expose years of hidden abuse, she decides to seek revenge—enlisting the help of her father, a sadistic game master. But this turns out to be an outrageous, twisted psychological punishment, a grotesque retribution fueled by her own inner demons. Subjected to relentless, obsessive training by a middle-aged man, Mihina is mentally and physically broken down. This is the ultimate birth of a perfect M-woman, confessing her own humiliating submission through sheer bodily obedience.