From the very beginning, Yuchae and Ji-Han had problems from the very first time they met.

Ji-Han, an AOS game ranker, was constantly being controlled by the pro-gamer 'Gam-Gak' and was constantly losing. Due to the constant control, he switched to an MMORPG called [Xenoris]. After joining a famous guild, the guild master 'Yuchae' started picking on Ji-Han for no reason, using Ji-Han's nickname. However, after finding out Ji-Han's AOS nickname, he suddenly started to actively hitting on Ji-Han, and Ji-Han exploded with anger at his changed attitude...

(Source: Ridibooks, translated)