Anti-Gravity Girl

The main character, Yoon-byul, was born with a physical feature floating in the air of 0kg, so she became a subject of study, and when she was old enough to go to high school after living in captivity at the institute, she transferred to high school in some way. However, the criminal organization is aiming for a chance to kidnap Yoon-byul, which depicts the confrontation between the institute and the criminal organization, and the process of Yoon-byul's adjustment as a normal person.

(Source: Namu Wiki, Translated)