Park "TusiN" Jong-ik was born in Waegwan, South Korea in 1995. Prior to playing League of Legends, he played other games, including Sudden Attack and Dungeon Fighter; however, when he grew bored of other titles, he switched to League of Legends and immediately loved the game. Recognizing his skill at the game, he decided to try to go pro so that he could earn money doing something he was good at. TusiN played on an amateur team called F1, along with Duke and Frozen, and in May 2014 he joined the Incredible Miracle organization.
TusiN joined Incredible Miracle 2 on November 17th, 2014 as their new support. The team only played in one OGN together at HOT6iX Champions Summer 2014 but the team failed to make it to the playoffs and dropped out in the group stage.
Changes to the OGN rules forced Incredible Miracle 1 and Incredible Miracle 2 to merge to form Incredible Miracle. None of the players from IM1 stayed with the team so TusiN was given the starting support position. They participated in SBENU Champions Spring 2015 but placed 7th and were forced to play in the Champions Summer Promotion Tournament. TusiN switched from support to jungle prior to the tournament and they ended up qualifying for SBENU Champions Summer 2015 after going 2-0 against Winners and Anarchy. Spooky joined Incredible Miracle to share the starting jungle position with TusiN. IM placed ninth in the regular season of Champions Summer and were forced to play in the LCK 2016 Season Spring Promotion. Incredible Miracle played the Dark Wolves in the promotion tournament and managed to beat them 3-1 to requalify for the LCK.
IM competed in the 2015 LoL KeSPA Cup where they lost 2-1 against the Jin Air Green Wings in the first round.