Afterward, Tanjiro and Zenitsu ventured deeper into Mount Fujikasane, each probing the other about their situation.
As they conversed, the two gradually became more familiar with one another.
However, Haru, traveling alone, was unaware that under his influence, the timeline of Tanjiro and Zenitsu's acquaintance had been accelerated.
The story began to diverge from its original course starting at this point.
Having already entered the depths of Mount Fujikasane, Haru soon encountered a demon blocking his path.
This demon had been imprisoned in Mount Fujikasane for a very long time, and had become insatiably hungry for human flesh.
Upon seeing Haru, the demon's drool flowed uncontrollably, and its disgusting appearance left anyone who saw it speechless.
Haru stopped in his tracks and disdainfully said, "What a disgusting creature!"
"The Demon Slayer Corps has finally brought me some food! The smell is making my mouth water!" The demon regarded Haru as food, and couldn't help but display a creepy grin.
However, in the next moment, the demon's laughter was abruptly cut off as Haru appeared behind it.
"Water Breathing, First Form, Water Surface Slash."
Haru spoke calmly, and after drawing his sword, the Demon-Slaying blade was immediately sheathed again.
In the next second, the demon's head rolled to the ground, its eyes filled with fear and disbelief as it faced death.
"How can you be so strong?!"
As the demon's last words left its mouth, its body and head quickly turned to ash, completely disappearing from this world.
After dealing with the demon, Haru carved a water-like mark on the nearby tree trunk.
Then, without pause, Haru continued his search for the next target. Using the small map provided by the super-dimensional system, he quickly headed towards the nearest red dot.
The demons in Mount Fujikasane were all marked on the small map with red dots. With this help, Haru no longer had to search aimlessly for his targets.
However, this small map was not available 24 hours a day—it only appeared during the time when demons were active.
Haru speculated that this was likely a measure by the system to prevent him from hunting demons during the day.
After all, demons were afraid of sunlight, so they could only hide during the day. If Haru used the radar map during this time, the demons would have no way to escape, essentially becoming helpless lambs for slaughter.
It seemed the super-dimensional system did not want Haru to complete the task too easily and only allowed him to act at night.
Of course, Haru could choose to act during the day, but without the radar map, it would be very difficult to find demons in daylight. Even if he did find some, it would only be one or two at most.
Therefore, Haru naturally wouldn't torture himself and tire himself out like that.
"Don't come closer! I don't want to be eaten!" When Haru arrived, the demon had already pounced on a young boy and was mercilessly biting his neck.
In this critical moment, Haru leapt into the air, performing the second form of Water Breathing, Water Wheel. The Demon-Slaying blade in his hand traced a circular trajectory in the air, with water droplets splashing as the sword cut through the demon's neck.
The demon that was about to bite the boy immediately turned to ash, and the boy was spared from the fate of being eaten.