October 21, 1913

Kengo patiently waited in an abandoned house in a small village for nightfall to come. As he tapped his foot on the floor, he said to himself as he looked at his watch, "Ten minutes to go before I head up. Come on, hurry it up, damn it!" He would go up and out of the house at 8 PM, and upon doing so, would enact his devious plan to wreak havoc on the village.

Once the ten minutes finally came and went, Kengo checked his watch again and took a deep breath as he grabbed his wakizashi as well as a few smaller knives. As he was about to head out the door, however, he heard knocking come from the other side. "This is the police! We got reports of a squatter on the premises! Come out!"

"Shit," Kengo said to himself as he pulled out his wakizashi. "I'll have to start early." He then opened the door to find two officers standing and waiting for him. "Sorry in advance, officers!"

"What the fuck?!" Both officers were startled to see him with a sword. Kengo then struck down one of the officers, stabbing him in the chest twice before his partner shot Kengo twice. However, being a demon, the bullets had little effect on him as Kengo then stabbed the other officer. As the two struggled for a brief few moments, Kengo kept stabbing him until he stopped moving and died on the ground. "Fuck… No… No…"

Kengo then took a chunk of flesh out of one of the officers and ate it before wiping his mouth with his free hand. "Ah, nice. Now, time to really begin the killing spree." He also grabbed their guns and ammunition just in case he needed it.

A villager who saw the murders take place across the street from his house then ran out, holding a wooden plank as a weapon and yelling at Kengo, "I saw everything! Get the fuck outta our town before I beat your ass senseless, you monster!"

Kengo thought to himself, "This guy's house can be my first target!" He then ran up to the man and impaled him on his sword, running it straight through his stomach before he then used his free hand to claw at his face and rip his eyeballs out, eating them before he pulled his sword out and let his body fall. "Thanks for the meal."

The man's wife, carrying their infant son, ran down the stairs, yelling, "Hisao, what's going on?! What ha-" When she saw what had happened to her husband, she screamed before yelling, "What the fuck?! What did you do to my husband?!"

Kengo then pulled a knife and threw it at the woman, stabbing her in the chest and causing her to fall and drop her infant. "Nothing personal. Trust me." As the infant cried, he then decapitated it to make it stop. "Babies are fucking annoying little creatures. I hate hearing crying."

The woman said to Kengo as she tried to get up, "How dare you… You bastard!"

Kengo then stabbed her with the same knife he threw again, this time in the neck to kill her as her other two children came running down the stairs. "Mommy! Daddy! Jiro!"

Kengo caught one of the children and slit her throat before running after the last child, catching him on the stairs and stabbing him twice in the back. As the child screamed in pain, Kengo told him, "Have a good life next time! Maybe you won't be killed by me, kid!"

As Kengo left the house, he calmly walked out, still drenched in blood, and knocked on the front door of a house a few doors down. After a few seconds of patiently waiting, an old man answered the door. "Hello, young man. What do you ne-"

Kengo cut him off by stabbing him in the mouth with his wakizashi, going clean out the other side. "I need you to die. That's what I need. Now, where's your wife…"

"Katsuki, where are you?"

After hearing the old man's wife, Kengo calmly walked over to a bedroom where he presumed his wife was and slid the door open, only to find nobody there. "Shit… Where is she?"

"Katsuki, is that you?!"

"Aha!" Kengo then barged into a room next to the bedroom and found his wife sitting and making tea. "There you are!"

His wife screamed and demanded, "Who are you?! Where's my husband?!"

"He's dead," Kengo bluntly told her.

"What?! Why?! Did you kill him, you bastard?!"

Kengo then stabbed her with his wakizashi twice in the back before struggling with her and finally slitting her throat. "Dumb old bitch, of course I killed him!" He then got up and saw a bucket of water nearby, washing his hands in it before drinking the water he had just washed blood off into. "Okay, that's nine people so far. I want to kill at least thirty."

As he walked out the house, he scanned a street nearby and walked around to find his next house to strike. He then set his eyes on a small noodle shop with an attached house above that was still open. Seeing as he could potentially kill many victims inside, he decided to head on in and give it a shot. As he walked in, the shop owner said, "Hey there, welco-" He then noticed that Kengo was still smeared in blood. "Uh… Are you okay? Do you need to see a doctor? What the Hell's with all that blood?"

"It's not mine," Kengo told him before he pulled out one of the stolen police guns and fired six shots into the shop, striking the owner and two customers. As some customers ran out to safety, the few that remained were quickly dispatched by Kengo as he stabbed them with a knife using his free hand. "There we go! That makes fifteen!"

"What's going on out here?!" The shop owner's wife and older son ran down from the home above the shop. Kengo used a throwing knife to kill the son before he grabbed the wife and slit her throat with his sword.

"That makes seventeen!" He then ran up the stairs and burst into the bedroom where the shop owner's other five kids were sleeping, one as young as a few months old. "This will make twenty-two!" As one child got up and tried running from him, he shot him with the other stolen gun he had. He then shot the others, all of them once. "Fucking little shits! Stop crying already!"

Once he was finally done massacring the children, he stabbed them to ensure they were dead, ignoring their screams for mercy. Once the last of them died, he tossed the dead infant out of a window, smashing the glass and causing the body to fall to the ground below in front of horrified villagers who had come over to see what had happened. One villager fainted, while another yelled, "This man's a monster!"

Two police officers ran up the stairs, but Kengo had just reloaded his two guns, so he shot them both with both guns at once. "Twenty-four." As they both fell down the stairs, Kengo stepped over them and calmly walked outside to a crowd of about twenty frightened villagers. He laughed and told them all, "You guys must love my work!"

They all panicked and ran away from him when he took a throwing knife and threw it at a random woman in the crowd, striking her in the head and killing her instantly. "Run away! This guy's unstoppable!"

As the crowd all ran together down the road, Kengo fired from the stolen guns he had, striking several people and taking them down before he lost sight of the crowd. He then walked back inside and stole the other two cops' guns and ammunition. When he came back outside, he walked to the people he shot in the crowd and stabbed all of them, including one who had initially survived and was trying to crawl away. "That makes twenty-nine. I need one more at the very least." He then reloaded his guns and walked down the road to find his next target.

In an alleyway nearby, a young teenage couple hid from Kengo. The girl whispered to her boyfriend, "Is he gone?"

"I don't know," her boyfriend replied.

Then, they both heard footsteps in the alleyway, and both turned around to find Kengo staring them down. The girl screamed, "Run, my love! Run!"

Kengo shot and killed both of them, striking both in the head. Due to the extent of their injuries, he decided not to stab them further. "Those two are definitely dead. The one bitch's head's all over the place, and that guy she was with got two bullets to the face. Kengo, you've really outdone yourself today. That makes thirty-one."

"Hey! Over here!"

Kengo then turned around and saw a regular demon slayer standing in the alleyway. "Oh? A slayer?"

"Your rampage ends now, fucker! It ends at thirty-one!" The slayer then charged at him, declaring, "Breath of Water, First Form: Water Surface Slash!"

Kengo managed to just barely dodge the attack, and shot at the slayer, striking him in the shoulder. "There!"

"Fuck, my shoulder!" The slayer then drew his own revolver and aimed it at Kengo with his uninjured arm, striking him twice. "Take that!"

"Guns won't work!"

"These bullets are poisoned!"

"But not good enough! I'm a Lower Moon, after all!" Kengo then dashed forward and slashed him across the chest with his wakizashi, fatally wounding him. "Agh, you did hurt me, though… You fucking asshole!" Kengo then stabbed him in the head twice with his wakizashi. "Join your comrades in death, you piece of shit! That makes thirty-two!" As he walked back out onto the street, he turned and began walking slowly, inspecting each building he walked by to see what his next target could be. "Hmm…"

Meanwhile, Kokushibo had just come into the small town center himself. He was surprised to see the streets almost deserted, and when two people ran away from him in fright, he began to realize why. He said to himself, "So, Kengo has already begun…"

After a few minutes of searching, Kengo and Kokushibo ran into each other in the middle of a small street. Kengo waved to Kokushibo and asked him, "Hey there! How are you doing?!"

"I'm doing fine," Kokushibo replied. "How's your attack going?"

"I've killed thirty-two people so far," Kengo explained. "I'm gonna kill more."

"Sounds good to me," Kokushibo replied. "I'll keep watch on the outskirts. Keep at it inside the town."

"Very well," Kengo replied with a bow before walking away. As he did, he noticed an outsider walking along the street as well, clearly not from the village due to his clothing and his unfamiliarity with the area. "Hey there! Are you lost?!"

"I am," replied the outsider. "Do you know where the nearest post office is?"

"Yeah," Kengo replied. "I could bring you there."

"Why thank yo-"

Kengo then impaled him on his wakizashi, going right through his chest. "But I don't exactly feel like helping humans out. Sorry." He then ripped his sword out of him. "That makes thirty-three of these bastards down, and even more to go. Maybe I can make it forty."

Kokushibo looked at the body of the human Kengo had just killed and said to it as Kengo walked away, "Wrong place, wrong time, human."

Meanwhile, the now-murdered slayer's crow arrived at Muichiro's house about fifteen minutes after his death. Upon doing so, the slayer, who was still up and was sharpening his sword, asked the crow, "What brings you here?"

The crow squawked at him, clearly in grief and distress, "My slayer was murdered by a powerful demon in the village of Taiwa! That same demon's massacring the whole village! There might be two demons there, not just one!"

"Taiwa?! What the Hell?!" Muichiro then put down his sharpening stones. "That's only fifteen minutes from here by foot! Go tell other slayers, please! I'm sorry about your own slayer. I will avenge him!" As he ran back inside, he thought to himself, "A really powerful demon?! Could it be one of the Twelve Demon Moons?!"

When he ran inside, Mukago asked him, "Mui, what's going on? Is everything alright?"

"There's a huge emergency in Taiwa! A really powerful demon is attacking the village!" He then gave her a quick kiss. "I'll be back. Stay safe, please. For us, and for our children." He then rested a hand on her stomach.

Mukago nodded. "Right."

Ginkgo then flew into the room, asking her master, "Do you want me to spread the word, too?"

"Absolutely," he replied. "Let as many slayers know as possible!"