After Kazuma barged into the room demanding explanation for what happened and to why Yuuji was in the hospital. Amilia explained to Kazuma what happened and who that Allen guy was. To Amilia's surprise Kazuma knew him. He heard of him before in the guild and also has seen him playing with kids before and making them laugh.
"So you're saying that this guy is nice ? he plans on stealing something that might be important"-said Yuuji confused at what Kazuma was saying about Allen
"I'm not saying he's nice. All i'm saying is he has some sort of a soft side that really does confuse me too."-replied Kazuma crossing his arms
"You need to recover and train harder if you want to beat him. This time i'm also gonna come with you."-continued Kazuma to which Yuuji was about to refuse
"I'm. Coming. With. You"-said Kazuma before Yuuji would reject
So the two weeks have passed. Yuuji got out of the hospital and immediately started training. Kazuma seemed to be relatively harsh in training ordering and bossing Yuuji around but it's understandable since Yuuji did nearly get himself killed.
At the end of the day
"Good work today, Wakana-kun"-said Kazuma with a serious face
"What's with the Wakana, you"-said Yuuji while taking his breath
"Until we're done with this training i'll be using formal way to address you"-replied Kazuma
"Anything but Wakana"-said Yuuji
"I don't understand your hatred of the name at all"-said Kazuma while leaving
"You really don't want to know..."-said Yuuji to himself in a voice that Kazuma wouldn't hear
The next day this continued, Training hard and constantly doing spars with Kazuma. Those spars had only one rule 'No using elemental powers'. A rule that you'd think would put Kazuma at a disadvantage but Kazuma is from a family that specialized in swordsmithing and swordsmanship.
Yuuji's movement slightly improved over time to be on level with Kazuma. If Yuuji had to describe it he would say that Kazuma is on par with Allen. Day after day Yuuji was training hard. One day, while Yuuji was training in the outskirts he saw Allen watching having his legs crossed.
"Please continue i've come to just watch my amazing rival."-said Allen giving a signal to Yuuji to continue
"I'm coming for you, Asshole"-replied Yuuji with an irritated tone
"Woah, No need to call each other bad names don't you think ?"-said Allen sarcastically
"I don't care about your stupid rules or intentions here with me i only care about protecting people"-replied Yuuji
"Fine. Fine. I'll leave. I'll go play with the kids in the city. I wonder if they're playing 'Adventure' again. Goodbye, Boy. I'll see you when you're fully ready "-said Allen while leaving
"That bastard will get what he deserves. I'll make sure of it"