From mission 9, it was clear that it gave everyone a chance to better complete the other missions.
At the very least, becoming stronger would increase the probability of success and give them more confidence.
Otherwise, they wouldn't know how to handle the later missions.
Leaving aside the research institute, destroying an evil faction alone would be very troublesome.
If they could improve their physical attributes through crystals, the humans of this world could certainly do the same.
After reading the mission descriptions, the second page contained detailed introductions and supplementary activity rules.
The first part was exactly about the mutated crystals.
Humans in this world could rely on mutated crystals to become stronger, and there was a very low probability of gaining superpowers.
Since they had entered this world to survive with at least one ability or transformation item, using mutated crystals would only improve their physical attributes.
However, the effect of using mutated crystals on them was ten times greater than on the people of this world!
The second part was one of the activity rules.
They could only survive within a nearby large city; they couldn't go out to farther places.
The rural area they were in now was considered the boundary of the activity zone. They couldn't go further out, otherwise the mission would be considered a failure.
Looking further back was the background of this world.
Six months ago, a world war had broken out in this world, with large-scale use of nuclear weapons.
Among them, a secret research institute in the Red King Nation was affected, causing a virus leak.
Thus, under the combined effects of nuclear radiation and the airborne virus leak, many creatures mutated.
As for humans, even though they initially avoided the nuclear war disaster by building underground bunkers in advance, they couldn't escape the widespread radiation and virus.
Up to now.
After the screening process, 90% of the surviving humans died instantly, while the remaining 10% managed to survive the virus. Their lives were then ten times harder.
Now, even though radiation was still present in the air, and the virus still existed, the surviving humans had developed antibodies. Wearing a protective suit when going out was enough to avoid most radiation issues.
Naturally, areas with high radiation were still forbidden zones for humans. However, the place where Kaito and the others were located was the city least affected by radiation, so they didn't need to worry about human forbidden zones.
"So that's the situation. Next, we need to head to the city to survive."
"Although it's not impossible to survive directly in this rural area, the resources here are simply too scarce."
After reading all the content, Kaito handed it to the others to read. Soon, everyone had different expressions. Looking at the environment of this world, some couldn't help but tremble a few times.
Fortunately, this was happening in this world, not in their original worlds...
"Kaito, we'll need to find protective suits later, but where are they here?"
Shodai frowned slightly and raised a crucial question.
It was fine in the rural area, but entering the city without protective suits would be a disaster.
"There's no need to worry about that. I think... the parent-child activity wouldn't be that cruel."
Even if it was hell mode, since they were thrown into this place, they would definitely be given some preparation!
Come to think of it...
Calling this environment and these missions a "parent-child activity" was really something else.
Looking around, no intact houses were visible; they were mostly building rubble shattered by the blasts.
However, Kaito did spot a three-wheeled cargo truck lying on its side. He wondered if it was still usable.
"Time's up. Our adventure officially begins now."
"But before that, I'll put up shields for you, just in case!"
The 30 minutes ended quickly. After the system prompted, Kaito's abilities became usable.
First, he used it on those with the weakest combat abilities.
It consumed physical strength and mental energy, but putting a single Jade Shield on each person was about equivalent to running 200 meters at a fast pace?
Relatively speaking, the defensive effect of the Jade Shield was about enough to block a sniper rifle bullet.
If they wanted a stronger defense, it was also possible. Even though it was weakened to only 5%, it could still easily block a large missile attack!
But the consumption cost would likely be much higher.
To put shields on everyone, and at least two layers per person, Kaito could only choose this level of defense.
5 minutes later...
...Tired, thirsty, hungry, suddenly questioning life.
There were 15 people including himself.
Two layers of shields for each person. Now, Kaito felt like he had run 6 kilometers non-stop.
And it wasn't jogging; it was sprinting!!
Breathing heavily, Kaito couldn't help but sigh.
Having become an ordinary person again, even with muscles and slightly better physical condition than a normal person, he was still an ordinary person!
Anyone would be exhausted after continuously sprinting 6 kilometers!
"Kaito, do you want to rest for a bit?"
Sephie asked with concern, and the others chimed in agreement.
Only Mamako and Chiyo curiously watched Kaito the whole time.
The mother-daughter pair had also noticed that Kaito was essentially the center of the team.
Well, for them, Kaito seemed very reliable and gave a great sense of security.
Plus, he was handsome and considerate, so the mother-daughter pair didn't feel any aversion to him, even though he was the only male among so many women, especially since they would be living together in a base.
On the contrary, their curiosity and favorability were very high.
Mamako, who had never been in a relationship before, even thought that becoming a couple with Kaito would be a wonderful thing.
"No need. I can recover while walking. Let's first... let's first see if that tricycle over there can run! If it can, we won't have to walk all the way to the city."
"Alright. Then let me support you?"
"Then... just lend me your shoulder!"
After a moment of hesitation, Kaito nodded.
And so, Sephie helped Kaito walk to where the three-wheeled cargo truck was.
After some inspection, although it looked a bit battered, it seemed like it could still be used.
It appeared the parent-child activity wasn't that cruel. Now, everyone just needed to work together to flip the truck back upright.
"Okay, get on. Let's go!"