薄幸な公爵令嬢（病弱）に、残りの人生を託されまして　前世が筋肉喪女なので、皇子さまの求愛には気づけません!?

The rest of her life is entrusted to the daughter of an unlucky duke (who is sickly), and since she was a muscular mourner in her previous life, she doesn't notice her courtship with the prince!?

Hakko na Koshaku Reijo (Byojaku) ni, Nokori no Jinsei o Takusaremashite Zen-se ga Sukui Jakusha na Node, Seikando Raihu o Tanoshimimasu!? Raw free

儚げな見た目に強靭な魂―― 悪は拳で追い詰める!? 呉葉（武闘派OL）からクレハ（病弱な公爵令嬢）に異世界転生!! 所変われど悪を見過ごせなかった呉葉は、その外見を（いい意味で）裏切る大立ち回りを見せ、そこに居合わせた隣国の皇子と秘密を共有する仲に……。