An "SuNo" Sun-ho played for a Korean challenger-level team called PSW Ares in 2012, with teammates Ragan, Ssumday, and Loray. The team played in the eleventh NiceGameTV Battle Royal, losing 0-3 to NaJin Shield.
SuNo joined SK Telecom T1 as a mid laner in February of 2013. He first played with the team at the IEM Season VII - World Championship where they dropped out in the semifinals with a 2-0 loss to CJ Entus Blaze. A few days later, SKT was knocked out of the Season 2 GIGABYTE StarsWar League in last place in their group. They participated in OLYMPUS Champions Spring 2013 and made it to the quarterfinals but they lost 3-0 to CJ Blaze. SuNo left the team a few weeks later to join MVP Blue as a substitute top laner. He stayed with the team when they changed names to Samsung Galaxy Blue but left the team a few weeks after the change to join Quantic Gaming in NA as their mid laner.
Quantic qualified for the 2014 NA LCS Spring Promotion Tournament but they placed fourth in the Challenger stage with a 2-3 record and failed to qualify for the LCS. Quantic disbanded soon afterwards. In February of 2014, SuNo moved to Brazil to play for the newly formed, Keyd Stars. Keyd played in the Riot Brazilian Champion League 2014 and placed first in the regular season. They eventually won the playoffs too, with a 3-2 win over paiN Gaming. They played in the 2014 Season Brazil Regional Finals but lost 2-0 to KaBuM! e-Sports in the semifinals. SuNo left the team almost immediately after the loss.
SuNo joined ShowTime in China in July of 2015. ShowTime tied for third in their group in the 2015 LSPL Summer Season and were forced to play in the 2016 LSPL Spring Relegation Tournament. ShowTime lost 2-1 to Oh My Dream in the second round of the winner's bracket and then were immediately knocked out of the tournament with a 2-0 loss to Energy Pacemaker.Carries.
On December 9th, SuNo joined SK Gaming as a mid laner alongside fellow Korean, Dokgo.