There is a secret organization that carries out this particular mission. The protagonist, Anna, is a high school student. One day, she receives an email from a stranger. When she visits the place the email indicates, she finds a special organization led by Master L.
It's called Lucian Bee's... Yes, it's the organization is a savior for all girls. Anna is specially selected for a secret mission, "Change Uncool Guys in the World Plan"...