Alex wakes up in his bedroom with bandages on his body. He remembers the fight he had against that scorpion monster yesterday, he then remembers how berserk he went while he was about to get killed by the scorpion. He asks himself how he made it to his bed and then he looks at the time, he finds out it is just 10am in the morning and then he takes a deep breath and then breaths out. Kazuki is just sitting by Alex's window tells him to get up or they'll be late. He looks back and asks kazuki what he's doing at his house. Kazuki tells him to stop whining and get ready and then he tells him that there is a huge day ahead. Alex looking confused just signs and jumps of his bed. Later in that morning, alex, serena and kazuki are in a classroom waiting for Tomoa to come. Tomoa gets in the classroom and tells them to pay attention, he explains to them that since they both failed the first test which was to get some energy stones from the dead forest, he explains to them that their team leader will be assigned to them. He tells them that they will have to fight with him and if they manage to reach his expectations, they will pass. Tomoa then tells them to do their best and then he exists the class room, serena then says that since he's a team leader, doesn't that mean he should be an A rank assassin or something, alex then says that whether the bastard is A rank or anything their is no way he'd lose at all. As their team leader approaches the door,Alex gets a crazy idea in his head. As their team leader enters the classroom, he see's both kazuki and serena sitting down, he introduces himself as diablo. He tells them that he is going to be their team leader and is going to be training them, he then notices something strange. He asks them where the third member of the team is, alex then flash steps behind diablo ready to kick him, diablo then dodges alex without even bothering himself. Alex is abit shocked and then diablo just taps Alex on the head which made him fly all the way to the wall. Diablo just sighds and asks himself if this is actually going to go well.
He asks them for their names and introduces themselves. Latet that same morning alex, serena, kazuki with diablo are in a grass field, he tells them that their mission right now is to take him down. He explains to them that if they manage to hit him at least once they officially pass the trail. Kazuki then sighs and says to himself that fighting this diablo of a guy isn't going to be quite easy. He tells them to take their positions and then alex stands up and says he's going to mop the floor with him, kazuki sighs and calls alex a fool. Serena and kazuki go to a far distance to see the fight, serena says that she Hope's alex doesn't make a full of himself, diablo asks alex if he's ready and then Alex tells him he's born ready. He activates his energy fist technique and kazuki while seeing this just gets disappointed and asks if that's the technique alex wants to use. Diablo just who is waiting for alex to attack asks him if he's going to do something or not. Alex then increases his energy to plus 20 which changes from a blue colour to a green colour, kazuki is shocked to see alex increase the level of his energy fist while diablo smiles while being impressed.
Alex then starts to flash step all over around diablo with an incredible speed, diablo smiles and says he understands the tactics alex wants to use. Alex while flash stepping is throwing punches from different angles while diablo is just dodging him continuously. As this was going on, serena asks kazuki if they might have underestimated alex abit but kazuki doesn't seem to be surprised at all. Alex keeps up this same move and then diablo says he could do this all day, alex then jumps in mid air and says to himself that he needs a plan B to take out diablo.
He then teleport back to the ground and starts going into close combat with him. as they were going into close combat, diablo while dodging Alex's attacks, he commends him for having a very tricky plan up his sleeves, Alex while throwing attacks at him asks himself what he's going to do next due to the fact that diablo is just dodging his attacks with his eyes closed, he quickly picks up his dagger from his pocket, throws it's at diablo, diablo dodges it and then the dagger transforms into alex. As he was about to hit diablo, he slaps Alex's so hard that he flew into a nearby river.
Diablo says that fighting alex was fun but he got bored at a point. A purple beam then flies out of nowhere and hits diablo.