Choi Yeon-sung (born 5 November 1983), also known as iloveoov, is a retired professional Korean StarCraft player, and currently a coach for the Afreeca Freecs' League of Legends team.
As a Terran player he was known for his excellent macromanagement, leading to his nickname "Cheater Terran".
However he is better known as "Monster Terran" (Gweh_Mool Terran) because of his ability to produce a massive number of units.
He sees Lim Yo-Hwan, who was on the same team as him, as an older brother or mentor.
Lim scouted Choi through a match in battlenet after losing to Choi's Terran, Zerg and Protoss.
Choi beat Lim 3:2 in 2004 during the Ongamenet Ever Starleague finals.
The 'oov' in his nickname is believed to be the ASCII emotion icon of a face and two fingers forming letter 'V' which stands for victory.
He announced his retirement as a pro-gamer as a result of a wrist injury, to become a coach for his team.
Since then, Choi returned to the active roster as a "player coach".