He said if he was not a Kpop singer he wanted to be guitarist. Bangtan Sonyeondan also known as the Bangtan Boys is a seven-member South Korean boy band formed by Big Hit Entertainment. He also managed to master guitar in only 8 months.
That is why he can master guitar only in 8 months.
He is in Super Juniors sub-unit Super Junior-T. Japan being a close neighbor to South Korea many kpop idols are from Japan. At the beginning of 2017 2 members left and 3 new members were added. Their lyrics touch on the themes of mental health troubles of school-age youth loss the journey towards loving oneself and individualism.