Upon hearing the voice outside his house, Zack let out a sigh of exhaustion. It's amazing how things can change in a week. Zack approached the window and looked towards the entrance of the house. There, a boy was being 'attacked' by Titan. The fierce beast had a grip on the end of the boy's pants while he tried to get him to let go.

"What are you doing?" Zack asked loudly to the figure in front of his house. Upon hearing his voice, Max looked up and, upon seeing him, pleaded for help with his eyes.

"Titan, let him go!! He's learned his lesson!!" Zack shouted from the office. As if waiting for those words, Titan released Max's leg and headed towards the house, filled with pride for defeating the intruder. He didn't even bother to look at Max, who was trying to wipe off the drool from his pants.

Zack wasn't surprised to see this. From the first day he acquired Titan, he noticed that the creature was highly intelligent, much more than any dog in his world. He didn't know if this was common in all animals or if Titan was just special, but it didn't bother him. In fact, it made his life a bit more fun.

Woof Woof. When he descended the stairs, Titan was waiting for him in the living room. Upon seeing him, Titan's eyes widened, and his tail started wagging as he looked at Zack. He was incredibly cute, like seeing a child seeking praise for behaving well. 'Praise me, praise me' was written all over his face.

"Well done. You took care of the bad guys." Seeing how enthusiastic Titan was, Zack could only commend him for what he had done. In reality, this could be considered training.

"What do you mean by that?!" a voice resonated from outside the house, and a furious Max entered without any invitation. Seeing the intruder who had been 'defeated' entering his home, Titan gave him a disdainful look and proceeded to ignore him while enjoying the caresses from Doctor.

"You!" "Enough already! How long will you keep fighting with a dog?" Just as Max was about to start arguing with the dog, a voice behind him began to bother him. Rea approached the house followed by Max with a not-so-calm tone. It seemed Max was about to say something, but a look from Rea was enough to change his mind.

"What are you doing here again?" Seeing that neither of them was going to argue, Zack approached them.

"If I had known, I would have kept my mouth shut," he thought when they appeared here again. These days, the two of them had been visiting him frequently. Since they found out that he wouldn't charge them for checking how Max's leg was improving, these two had come every day to bother him.

Still, he didn't have the strength to kick them out. They weren't bad guys either. He was sure that it was thanks to their help that the villagers seemed happier to receive him when he went to the city.

It's not that they welcomed him with open arms, but at least they didn't seem to fear him as much. It was precisely because of this that a couple of villagers came here in the last few days to seek treatment, and that was the last drop that made him acquire one of his abilities: Diagnosis.

This story is posted elsewhere by the author. Help them out by reading the authentic version.

He didn't plan on telling anyone. If someone found out that a doctor without any ability had treated him, his patients might faint from shock.

"Today we came with a surprise," Rea said cheerfully as she approached to pick up Titan from Doctor's arms, who didn't resist.

"Great," Zack said without much enthusiasm, ignoring the envious look Max gave his dog when Rea placed him on her lap.

Both ignored the tone of the homeowner during this time they had been getting to know him. They knew he wasn't a bad person. If he wanted to kick them out, he would have done it a long time ago.

"You can come in now," Max said cheerfully.

The person who entered through the door was someone Zack didn't expect.

...

"Airi. Airi, wake up."

Suzumiya Airi's eyes opened slowly as she began to search for the voice that had called her. In front of her, three girls approached with worried faces.

"What's happening? Why aren't you asleep?" she asked as she slowly sat up in bed.

"We can't take it anymore. This is too much," one of the girls ignored her question and began to protest. The others seemed to share her sentiment.

However what they were saying seemed nonsensical, and she already knew exactly what they were referring to. It had been almost a month since they left the castle and settled into their new positions. In comparison to their situation in the castle, the situation was unfavorable. It wasn't surprising. They were on the battlefield.

At first, everything went well. After the collective protest they made when they arrived here, opposing being interrogated separately, the people in charge treated them with great care, as if afraid they would reunite. However, the moment they separated, and each went with their respective instructor, things began to change.

The boys who went to the city near the castle had it easier, but those who stayed here were on the front lines. Barely a week passed with their respective instructors before they started participating in combat. The situation was very different on the battlefield.

Their respective instructors were already busy trying to survive, they didn't have time to try to save them beyond the first days when they sent them to one of the peaceful areas to start learning.

Airi wasn't exaggerating things, although it was uncommon. She received news on one occasion that one of the instructors had died. Of course, the person who followed him didn't receive a more fortunate fate than following in his footsteps.

This was an exceptional case. Most of the time, it was they who died. Of course, their instructors would try to protect them, but in war, death is inevitable.

Three students.

In just one month, three students had died. Airi didn't know them well, but the time they spent together was real. Hearing that they had died was a disaster, not just for her, but for her entire class. At least, for those who were here.

On more than one occasion, images of Yamato and his group in the king's castle, enjoying the kingdom's food, came to the minds of the others. Another image came to Airi's mind when thinking about those who had escaped being here.

Zack.

From the moment they arrived in this world and he proposed to make a deal, Airi had been monitoring Zack's movements. It was a bit difficult because they were isolated from the rest of their classmates. However, just because others couldn't enter didn't mean they couldn't leave.

After learning that Austin frequently used to wander around the castle in search of something to take his mind off his training, Airi took the opportunity to approach him.

Thanks to him, she learned a lot about what Zack was doing. She had to be well informed to protect her investment.

It wasn't difficult. Zack wasn't the only one who didn't waste time while he was there. Airi also took the opportunity to learn a lot about her class. If it hadn't been for that, Airi could never have altered Austin's memory