MAOU NO MUSUME WA YASASHISUGIRU!! VOL.1-12 END

STORY :

Demon King Ahriman has a problem: his daughter, Doux, loves everyone! Consequently, Ahriman had to halt his invasion of the world in the worry that his daughter's behavior is not one befitting someone of her kind. She loves making friends, helping others, and bringing happiness to all creatures including their enemies, the humans.
Ahriman, however, congratulates Doux for her good deeds instead of scolding her. With the help of his aide Jahi, who is assigned as Doux's master, the two try to get rid of her kindhearted nature—so that the Demon King's daughter goes from a cute, adorable, and nice little girl to an inhuman, cruel, and twisted little demon.

这个世界上，有着将一切邪恶汇聚于身、率领魔族并靠着暴力与权势侵略世界的魔王阿里曼。然而这样的魔王，却不知为何突然完全停止了一切侵略行动。让魔界最强魔王甘愿收手不侵略的理由竟然——是魔王的女儿豆豆，实在是太温柔了。
明明身为魔族出生，豆豆的温柔程度却高得夸张。她的善良，甚至足以把凶恶的魔族、暴躁的魔物、被奴役的人类，就连不共戴天的敌人——天使，通通疗愈得服服贴贴。面对这样的女儿，让魔王整天只剩下担心，早就没空再去搞什么侵略了。
看到魔王为此苦恼不已，亲信贾希下定决心，要把豆豆培养成货真价实的魔族，于是开始对她施加各式各样的试练。但贾希此刻还不知道的是，那些试练反而只会让豆豆的温柔，变得更加无远弗届。而这样的豆豆，那份温柔也逐渐在这个一点也不温柔的世界里，激起了一圈又一圈小小的涟漪——