Kim Ah In, known professionally as A-IN, is a South Korean singer, dancer and former member of NOM (엔오엠) and TST (일급비밀; previously known as TOP SECRET). He won the Grand Prize at The National Youth Dance Contest and Mnet Dream Project Dance Division Championship.

He made his debut in 2013 as part of NOM, but the group struggled to promote their music and disbanded in 2016 after 3 mini albums. He re-debuted in 2017 as TOP SECRET's leader, main dancer and vocalist with their 1st mini album, "Time's Up". The group changed their name the following year to TST but faced controversy with Kyeong Ha's legal charges later that same year.

In 2020, Yohan was found dead, and a few months later, the group disbanded. He enlisted for his mandatory military service on April 6, 2020, and was discharged on October 12, 2021. He returned to the industry in 2022 when he participated in Mnet's "Be Mbtious", a survival dance competition.

(Source: MyDramaList) Edit Biography