Kishi Ni Akogareta Saikyo No Ken Shi, Kishi Kakei No Ochikobore Reijo Ni Tensei Suru. 1 (Gangan Comics up!)

[Machine Translation] The second life of the strongest swordsman who longed to be a knight is ...... fallen daughter! A man longed to be a knight. He is loyal and wields a sword for his beloved master. That beautiful way of being. Even though he eventually became the most powerful man on the battlefield, his dream of becoming a knight never came true. He was supposed to have died with a sense of regret ......, but "What the hell is this? The strongest somehow wakes up in the form of a girl! A man reincarnated as the daughter of a noble family fights against his brothers and sisters who look down on him, and is even looked up to by a princess,...... and enjoys life regardless of his sickly body or the harsh environment he finds himself in. This is a tale of a knight idiot who has become a girl, and rises to power based on her overwhelming abilities in her previous life!

騎士に憧れた最強剣士のセカンドライフは……落ちこぼれ令嬢！？男は騎士に憧れた。忠誠を尽くし、敬愛する主人のために剣を振るう。その、美しい在り方に。やがて戦場で最強と呼ばれるに至ろうと、騎士になる夢は叶えられず。無念のまま死んだはずだった……のだが、「なんじゃこれはぁああぁあああぁぁあ！？」最強はなぜか少女の姿で目を覚ます！？貴族の娘に転生した男は、自分を見下す兄妹達と戦い、王女からも見初められ……病弱な体や、過酷な環境も関係なしに人生を謳歌する。少女になってしまった騎士馬鹿が、前世の圧倒的な実力を元に成り上がっていく無自覚無双譚！