The first floor until the fourth floor, the walls are light blue colored, and according to the Guild, the monsters that appear are Goblins or Kobolds. There is also a wide hallway on the 1st Floor known as the Beginning Road. Newbie Level 1 adventurer with a status of I to H in their basic abilities normally spend time on these floors.

"C-couldn't you have restrained it in a more peaceful manner?" Aika reeled back a bit after seeing the gruesome scene.

"We're going to kill it, regardless. So don't think much about it. Others probably stab it multiple times before it could kill it."

Kisuke didn't mind their conversation and slowly walked towards the restrained goblins and the first thing he did it to stab the one Yoruichi restrained in the head, causing it to reduce into ashes and leaving behind a magic stone which they could use to trade with the Guild for some Valis, the currency in this place.

Kisuke carefully observes his body for any changes and spotted one very tiny change. While the Mana from the Goblin immediately dispersed to the surrounding, returning to the Dungeon, a very small part of the spiritual energy came to him and strengthened the 'nerves' that were created to supply Mana to his body by a tiny margin, almost nonexistent even, 'I see... so these 'nerves' expands and more Mana could come in once you've gathered enough 'excelia' which results in getting stronger...'

He then continued his experiment and pointed towards one of the Goblins, "Byakurai (White Lightning)." Firing a bolt of lightning towards the Goblin's head, he utilized his own Reiatsu-Ki for the kill. What he found out, however, is contrary to his expectations, 'I didn't get anything?'

The next thing he did is to unleash a bit of his Reiatsu-Ki and it boosted his body. He then beheaded another Goblin. Same result from before. He didn't get anything out of it. Resealing his Reiatsu-Ki and only utilizing the Mana from the 'nerves', Kisuke beheaded the last Goblin and he finally got the 'excelia'.

Kisuke stopped for a bit before facing his companions, "Let's look for more monsters. I want to kill at least a hundred of it today."

Kisuke then started his all-day killing spree of Goblins, Kobolds, a dog-headed monster, and Dungeon Lizard, a large lizard. The group reached the fourth floor when it's already afternoon. Within that duration, the girls are very bored because it's only Kisuke who can take action due to his 'research'.

"How many did he kill again?" Aika asked with a fed-up expression.

Yoruichi also has the same fed-up expression and replied, "Let see... 145 Goblins, 121 Kobolds, and 63 Dungeon Lizards..."

"How many monsters can an average Level 1 party kill in a day again?" Aika continued to ask.

"If I remember it right, a party of five new adventurers can kill around 10-15 Goblins and have a net income of 25,000 Valis..." Sona answered her this time.

"Who said about not drawing attention again, nya?" Kuroka muttered.

"Kisuke-senpai... And that's probably the last thing in his mind..." Koneko followed.

"As expected of master..." And only genuine admiration can be seen from Medusa.

After killing the last Goblin, Kisuke turned around and faced them with a very satisfied expression, "I think it's about time we go home~!"

Everyone except for Medusa gave him a glare.

Pretending to be oblivious to their stares, Kisuke started walking towards them but just as he was about to take his third step, Kisuke felt a large fluctuation of Mana from the surrounding. The girls also felt it and put up a stance to meet anything that is thrown to them.

A few seconds later, around the group, the wall of the room where they are started crumbling and three different monsters started appearing from the wall, "Is this the infamous Monster House?" Kisuke muttered as he observes the flow of Mana and Spiritual Energy. Aside from the large influx of energies, he didn't notice anything else.

When the Dungeon finished birthing the monsters, the total number of monsters that appeared is around 200. If the adventurers or Guild were to know this event, they would immediately panic as never in the history of Dungeon where a Monster House consisting of more than 30 monsters on the upper floors.

Before the monsters started attacking, Kisuke reminded them, "Guys, leave this to me..."

"But we wanted to fight too!" Yoruichi protested.

"We'll go somewhere with more challenge next time so leave these monsters for my data gathering for now."

"...Fine." Yoruichi then signaled everyone to take distance, "Let's go away first. It's like what he said, there's no challenge fighting these guys."

True enough, using their real strength, these monsters truly don't pose any challenge for them. So they agreed when Kisuke promised them that he'll take them to somewhere better.

Once they got some distance, everyone turned around to watch.

Kisuke, without using any of his real strength, danced around the crowd of monsters, killing them with a single stab to their vitals.

"...Hey, Yoruichi-san... Why don't I feel any of his Reiatsu-Ki for scanning his surroundings?" Aika asked curiously.

"Because he isn't using any."

"Hah!?" Aika's eyes widened, "Then how is dodging those attacks as if he can see from everywhere!? Is he using Mana then?"

The rest of the group also felt curious and waited for Yoruichi's answer.

"Indeed, those scanning and awareness techniques are convenient, but when you used them, it's also easy for others to track you."

"...Then how?"

"Aside from sight, which can confirm the movements of your opponents down to muscle tensions, and hearing to locate the proximity of his enemies, he uses his sense of touch to feel the air around him. With others moving around, depending on the environment, he can confirm movements from the air being pushed around. In conjunction with senses of taste and smell, he can make a virtual map in his head and plot his actions from there.

"Of course, if you're against someone strong or someone who can manipulate senses, the sixth sense plays a bigger role in detecting a bunch of things that your conscious mind can't."

"...That's insane... How can he focus on so many things? If I focus on my hearing, I would certainly discard my sense of smell..."

"Practice, a lot of practice. But not just some normal practice as you need to put your own wellbeing at risk for it to become effective. You can also train it using safe methods like meditating and trying to feel your surroundings, but you would need a long time to achieve something through that. What you need to know is that people can achieve a lot of wonderful things if there are risks.

"I know you lot can use some sort of detecting abilities, but if you want to improve your foundation, you have to learn like you have no power at all."

After hearing those words, the girls could only stare at Kisuke dancing around, not even letting a single drop of blood smear his attire. They all thought that it's beautiful, but then, a sense of urgency reawakened from everyone. They finally remembered that Kisuke and Yoruichi are too far ahead from them and if they want to join their journey, they at least need to put more effort than what they're doing.