Oh My Sickly Boss

Yvonne was always seen as a bit slow and not very smart since she was a kid. Her parents even adopted her uncle's orphaned daughter, who always tried to push Yvonne aside and steal the love from their dad and brother. But everything changed when a genius soul from another world took over Yvonne's body, giving her amazing superpowers. During a mission, she met the heir of the richest family, who fell in love with her at first sight.