releasing a digital single called 'Angel' in November 2011, and would release a full Japanese album alongside a Korean album in January 2012. Seven released his 2nd mini-album on February 1, 2012 with title track "When I Can't Sing." The track was produced by JYP and written by JYP, making it the first ever official collaboration between YG Entertainment and JYP Entertainment. 2013–2015: Military service and discharge On March 18, 2013, Seven enlisted for his mandatory military service at the 306 Reserve in Uijeongbu, Gyeonggi Province for five weeks of basic training followed by 21 months as an active-duty soldier. On that same day, YG Entertainment released Seven's music video "THANK U (고마워)". Seven was discharged from his mandatory military service on December 28, 2014. During his military service, the singer's contract with YG Entertainment expired in February 2015. It was later confirmed that they mutually agreed not to renew the singer's contract. 2016: Return to music, I Am Seven On July 6, he released "I'm Good", his first song since leaving YG Entertainment. On October 14, he released the mini-album I Am Seven (stylized I Am Se7en), his first album in over four years, along with the lead single, "Give It to Me", and its music video. After staying out of the public eye for four years, Seven announced he would return to promote in Korea after signing a new contract with Dmost Entertainment on April 17, 2020. Artistry Voice Seven's vocal range can be classified in the tenor range. His voice can be described as smooth, mellow, and sometimes mildly abrasive (see vocal belting) when songs, such as "Crazy," "La La La," "Hikari" and "I Know," call for it. He often sings with a vibrato in his voice that American R&B singers are known for, and also incorporates beatboxing into many of his songs such as "Passion." Se7en maintains an adamant belief that he should not lipsync during his live performances. Personal life Relationships In June 2009, Seven acknowledged on his website that he and actress Park Han-byul had been in a relationship for seven years, with the couple having first met when they were seniors in high school. Seven had previously denied rumours that they were a couple to protect Park's privacy. In December 2014, Park's agency confirmed that Park and Seven had ended their 12-year relationship earlier that year. In September 2016, news outlet Sports Chosen