Teisou Gyakuten Sekai no Doutei Henkyou Ryoushu Kishi

Synopsis

Faust was reincarnated from modern Japan into an alternate world where gender roles are the exact opposite of our world. He became a rare male knight in a world where women rule the land and men are in the submissive role. He achieves many military victories and is proclaimed a hero, but because of his sense of value from his previous life, he is constantly being tempted by the seductive, almost invisible, clothing of the queen, and non-stop sexual harassment from the big-breasted duke....... (Source: Comic Gardo, translated)