I Am Incompatible with You

She is a modern swimming champion and a hidden killer with both civil and military skills. But he traveled through time in an accident! It's a pity that other people traveled through time and became the eldest lady of the princes and nobles, but she traveled through time and became the body of a little loser... Speechless! Speechless! I thought she would counterattack and become a talented person, but she was careless and fell off the cliff, losing her body again...