At first, he and Aito met in a restaurant. He was with a couple of his friends while Aito was alone. It was love at first sight for him but not for Aito. He tried to get Aito's number that day but Aito gave him a wrong one and fled. One could imagine the shock he got when his school was assigned a volleyball match against Aito's school and they met each other for the second time on the court.
Yeo-sang didn't even know what to feel while Aito was as cool as a cucumber. He gave his all in that match and blocked every single one of Yeo-sang's spikes. He wasn't targeting Yeo-sang or anything. He just saw a chance and blocked successfully. Yeo-sang's team lost and he was devastated because that was the first and last time his father went to see him play. Ever since then, he held a grudge against Aito and made sure Aito lost every game if they were pitted against each other.
