Infinite H (Korean: 인피니트H) was the first official sub-unit of South Korean boy group Infinite formed under Woollim Entertainment in 2013. The sub-group consisted of Infinite member Dongwoo and ex-Infinite member Hoya. The sub-unit debuted with their mini album titled Fly High in January 2013.
Prior to their debut as a subgroup, the duo had performed new songs such as “Crying” and “You Look Good” during Infinite’s concerts and had already received much attention. Although they had been releasing new songs during concerts, Woollim Entertainment only announced that they will be promoting as a sub-unit in 2013 after finishing up with Infinite’s activities in Japan. They also performed, “Without You”, a song from their debut album at the “Infinite Concert That Summer” on August 8, 2012. On December 20, 2012, they performed for the first time as a duo on M! Countdown for a special stage.
On January 11, 2013, their debut EP Fly High was officially released. The duo started promotions for the album on January 10, 2013 on M! Countdown.
On February 28 and March 1, 2014, during Infinite’s encore concert, “One Great Step Returns”, Infinite H performed their new song Alone, which written by them. The song was later added to Infinite’s second full album, Season 2.
On January 26, 2015, their made comeback after two-years with released their second EP, Fly Again. Promotions for the album started on January 31, on M! Countdown.
In August 2017, Hoya left Infinite and Infinite H. The future of Infinite H remains in doubt.