Oliver was not one to hold back even when the fight was rigged. Alex already told him that he and the others should go all out since there was no way they would win. Oliver was a little bit, just a tiny bit irritated by that statement. Now that he had all his memories back, he knew that he and Alex were considered to be equals, and now he was telling him that he was left in the dust.
Niel and Kei started shooting at Alex, who simply diverted the trajectory of the bullets using his sword and evaded Oliver's attacks by swaying his body. The way he moved and smiled was like he was simply enjoying a little game with his friends, but the truth was one slip-up could possibly injure Alex severely. To make the fight look real, Oliver, Niel, and Kei were all aiming at Alex's vitals. Yet no matter how much they attacked they couldn't hit Alex who was moving around like a monkey.
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