with other idols and singers for the 2010 G-20 Seoul summit campaign song "Let's Go," released in October. 2011–2013: Solo debut and musical role On October 7, 2011, Jun. K released his debut single "Alive". The accompanying music video was uploaded to 2PM's official YouTube channel three days later. The song quickly climbed the charts and became number one on Cyworld. On March 14, 2012, it was released as a ringtone on Japan's Recochoku ahead of 2 pm's greatest hits album 2PM Best: 2008–2011 in Korea, where it could also be found as a bonus track in Limited Edition B. "Alive" managed to quickly rank in at number one on the daily chart. Following this, JYP Entertainment stated that the song "shows a deeper look into Jun. K's unique musical world. It has a smooth beat that reveals a new charm to the singer." He also recorded "Love... Goodbye" for the soundtrack of the Korean drama I Love Lee Tae-ri. It served as the male lead's theme. He began his acting career in 2012 with played in musical theatre The Three Musketeers. Jun. K played as D'Artagnan. He was played as Daniel in musical, Jack the Ripper in early 2013. In December 2013, He participated again on musical The Three Musketeers to performed in Tokyo, Japan. 2014–present: Solo activities In an interview with The Star in 2014, Jun. K revealed that Oricon's editor-in-chief had said Love and Hate was the number one album released in Japan that year and expressed his gratitude: "When I heard this I felt even better. I have really worked hard without any rest since December last year. I tried my best preparing it, but I'm really thankful to everyone who helped me achieve this good result, and everyone who congratulated me." Jun. K's Love & Hate concert tour ranked in the top 10 best concerts in Japan by Ranking Box, for having one of the most impressive live concerts of 2014, making him the only K-pop artist on the list. The editor-in-chief stated, "The album I personally listened to the most this year is Jun.K's solo album, 'Love & Hate', which was released in May. He's an artist who has an outstanding ability as a singer-songwriter, impressive voice tone, and musical talent. His solo live concert was rich with not only lyrical music but expressiveness as well." On June 11, 2014, Jun.K released the Korean