Kishi Danchou Kanrakusu Manga
Kakute Kishi Danchou: Himekishi to Suru / Kishi Danchou Jininsu: Nyoshin Henka ni Kusshita Kishi / Kishi Danchou Kanrakusu: Nyoshin Henka ni Kusshita Kishi / Kishi Danchou Series / The Commander's Submission / 騎士団長シリーズ / 騎士団長陥落ス
Completed Released: 2015
The young knight captain, a brash and forthright young man, decides to undergo a magical sex change operation to become a body-double for the princess to protect her. However, the events that awaits him is not what he expected. (Source: Toranoana, translated)