Konyaku Haki Sareta Reijo Wo Hirotta Ore Ga, Ikenai Koto Wo Oshiekomu Oishi Mono Wo Tabesasete Oshare Wo Sasete, Sekaichi Shiawasena Shojo Ni Produce!Konyaku Haki Sareta Reijou wo Hirotta Ore ga, Ikenai Koto wo Oshiekomu ~Oishii Mono wo Tabesasete Oshare wo Sasete, Sekaiichi Shiawase na Shoujo ni Produce!~; 婚約破棄された令嬢を拾った俺が、イケナイことを教え込む~美味しいものを食べさせておしゃれをさせて、世界一幸せな少女にプロデュース!~; Konyaku Haki Sareta Reijou o Hirotta Ore ga, Ikenai Koto o Oshiekomu ~Oishii Mono wo Tabesasete Oshare o Sasete, Sekaiichi Shiawase na Shoujo ni Produce!~; I Picked up a Young Lady Who Broke off Her Engagement, and I Teach Her All Kinds of Bad Things: I Feed Her Delicious Food, Let Her Be Fashionable and Make Her the Happiest Girl in the World!; I'm Giving the Disgraced Noble Lady I Rescued a Crash Course in Naughtiness: I'll Spoil Her with Delicacies and Style to Make Her the Happiest Woman in the World!; 捡到被退婚大小姐的我,教会她做坏坏的事; Vou Ensinar a Jovem Nobre Desonrada a Fazer Coisas Impróprias; Я прибрал к рукам девушку, которая потеряла своего жениха, и теперь я учу её всяким плохим вещам, кормлю вкусняшками, наряжаю в красивые вещи и вообще делаю её самой счастливой девушкой на земле!...
In the back of the forest lives Allen, the people-hating wizard. He is feared by the people around him and called the "Demon Lord".
One day, while living out his life as a hermit, he finds a young girl named Charlotte who collapsed. Although innocent, she was accused of evil wrongdoings, had her engagement broken and was forced to flee her country.
Upon hearing that, Alan recalled the bitter experience of being betrayed by a party he once believed to be his companions. Hearing the story of the 17 year old’s exploitation, Alan decides, “I'll let her live in my mansion, and I'll teach her all sorts of bad things…"
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