As you may recall from last time, Sakaki exposed us as a "cheater" because Haseo was kind of on one during the tournament in Vol 1. People On The Forums are discussing it.
Honestly I really like this as, to be perfectly honest, it's NOT really unfair to say he was cheating during vol 1 and his character WAS hacked to the level cap before the game starts. In a real sense, Haseo's reputation is built on a lie, even if the truth is way more complex.