He joined Pledis Entertainment on June 2012.
His biggest fear is getting no attention at all.
According to Seungkwan, he's greedy because he wants to be good at everything.
His role model is Kim Junsu. It's been over 10 years but he does musicals and solo activities and it looks very cool to him. He wants to be successful as a tea and then show his solo activities.
Seungkwan wants to be a singer who can run long with his members. He wants to prove that people's prejudice or groups with many members are wrong. He wants to be active from many sides. He says 'don't be arrogant and always be modest'.
Ever since he was in elementary, he participated in Children's song festivals which were held in school. Because he's from Jeju, he never thought of becoming a singer. Luckily, he got casted via an internet video his teacher recorded of him singing at the
He is Seventeen's atmosphere maker. If they are feeling down, he would go to the members and do voice imitations.Sometimes he would imitate the voice of their CEO to make them feel better.
According to Seungkwan, he remembers all of the members' birthdays.
Between Salty and Sweet, he prefers Salty.
The meaning behind his real name is that Boo means 'adult', Sung means 'success' an 'kwan' means generous. He wants to be a generous successor. He tries hard to be generous and loves giving energy to other people.