From bully to president?!

The students who were bullied by Shinbi, a school bully, grow up. Shinbi becomes the president of JS Group. Umji, a student who was bullied by Shinbi in school, becomes an employee of JS Group, and Sowon becomes a leader of the girl group G-Friend. Yuju and Eunha, who were also Shinbi's school bullies, become elementary school teachers, and Yerin, the daughter of the vice president of JY Group, becomes the president of JY Group.