Demon King regrets defeat! Seeing the simple appearance of the new hero who has appeared in the Demon King's castle, the Demon King is confident of a comfortable victory. However, before he knows it, he finds himself on the floor, his resistance futile as he is strangled and knocked unconscious... When he wakes up, he finds himself on a bed in an unfamiliar room... The Demon King has been fitted with a sealing collar and has lost his powers. The hero tells him, "You have become my slave"...?! Provocative seme x assertive uke [This work contains the following ryona elements:] - Bloodshed - Broken horns - Strangulation *The physical ryona scene is only at the beginning, which can be read in the sample on Pixiv. *The erotic scenes do not contain violent depictions such as punching, kicking, or strangulation, nor do they contain bloody scenes. 　https://www.pixiv.net/artworks/122648823 [Play content] - Hand and foot restraints/gag - blowjob from top to bottom - raw sex/ creampie - French kissing - gag reflex/choking - handjob and forced ejaculation - verbal abuse - gasping/scream - being held down - loss of virginity - drool/tears *The only tools used are restraints and a mouth opener. 　The sex content itself is not hardcore but normal. 　The bottom does not succumb to pleasure mentally. He will do his best to resist until the end.