MADK Series by Ryo Suzuri

Makoto has long been ostracized because of his odd hobbies and a sexual kink others would see as disgusting. One day he finds a book on summoning demons and manages to summon the intimidatingly beautiful and rather chatty Archduke J. The demon offers to grant Makoto’s deepest twisted desire in exchange for his life. Once Makoto has sated his demented appetites, he fulfills his end of the bargain, only to find he’s been reborn as a monster…in hell!

――Jを食うのは僕だけだ。歪んだ性癖のせいで"異常者"と言われ、一人ずっと苦しんできたマコトは、ある日、半信半疑で手にした「悪魔を呼び出す本」を使い、魔界の大公爵・Jを召還することに成功する。Jと魂の契約を交わし、悪魔に生まれ変わったマコトは、魔界で第二の人生を始めた。個性豊かな悪魔たちと過ごし、様々なことを学び成長していくマコト。そんな中、Jに対しある感情が芽生えていき――。

Makoto has long been ostracized because of his odd hobbies and a sexual kink others see as disgusting. One day he summons Archduke J—a trickster demon from hell—and sells his soul to him, only to unknowingly end up reborn in hell…as J’s demon underling! As he learns and grows in his new role, his infatuation with J turns into an obsession—an obsession to surpass the very demon who birthed him.