Akuyaku Reijou, Shomin ni Ochiru

A salaryman was suddenly killed one day. When he woke up, for some reason he became Kotone Kisaragi, the selfish daughter of a famous family. Taking over the life of the daughter who was disowned by her parents' house, he decided to lead a normal daily life. However, because of the original Kotone, he can't live a normal life!

(Source: Gentosha, translated)