"Titus!"

Inside a very large fancy library, a strange old man was busy inspecting the scrolls on the table when he was greeted by an another person. His ears are pointed and his head is bald, yet there's a large brownish white mushroom grows on his head. He wore a brown suit with a dark brown tie and a pair of black shoes.

The black haired guy is pretty much younger than Titus. He wore a black suit with matching fedora hat and shoes, and he was carrying a black briefcase in his hand.

"Ah, Fumimaru!" Titus greeted him with a smile. "Good to see you again, boy!"

"Still busy with your work?" Fumimaru said.

"Yes! All of these things you saw on the table are important for my latest research!" Titus stated.

"I see" Fumimaru briefly looked away. "Sorry for disturbing your time"

"It's okay, I don't really mind at all" Titus chuckled.

Fumimaru placed the briefcase on the nearby chair.

"I need to tell you something"

"What's it?" Titus was curious.

"The Messengers just met me recently" Fumimaru said.

"They met you?" the old man's eyebrows arched. "For what?"

"I have a new task to do" Fumimaru replied.

...

"Yushiro Yamamato"

"Mmmmm..."

The classmate of Nezuko, Yushiro hated it when someone just interrupted his sleep. That person even poked him with some kind of a stick. He then rubbed his eyes in annoyed manner.

However, when he finally opened his eyes, Yushiro was terrified to see the older guy who stood near his bed inside the infirmary.

That guy was none other than Giyuu Tomioka, the P.E. teacher of Kimetsu Academy, and also the advisor of morals committee. He even carried a shinai in his hand.

"TOMIOKA-SENSEI!?" Yushiro backed away in fear yet still be careful to not fall from the bed. "Wha...what are you doing...in here?"

"What am I doing in here?" Giyuu narrowed his eyes. "I'm looking for my student who went missing during my class, and finally I found him"

"Tomioka-sensei, I can expl-"

"Don't waste my time with your explanations, Yamamoto. I know you're skipping my class because you want to flirt with Tamayo-sensei, right?" Giyuu stated. "Geez, I can't believe that my own student is a pervert"

"But sensei, I'm not a pervert!" Yushiro denied.

"Enough of your excuse, Yamamoto. Now I'm going to put you into detention and not even Tamayo-sensei are going to help you" Giyuu said.

"No, sensei! Please, I beg you!"

"Don't resist, Yamamoto. I hope you'll enjoy your detention!" Giyuu proceeded to drag him away.

"NOOOOOOO!"

"DON'T TRY TO ESCAPE!"

Outside of the infirmary, Zenitsu only stood alone in the hallway with a scared expression as he could heard the desperate screams from Yushiro and furious yellings Tomioka-sensei.

"A GOOD STUDENT SHALL NOT SKIPPING THEIR CLASS WITHOUT A PROPER EXCUSE!"

"Nooooooo..." Zenitsu was shaking terribly.

How Zenitsu wished if Tomioka-sensei could be nicer to his own students for once.

...

"It has been one week since Minamoto-san disappeared"

"You're right!"

"Where did he go? Is he got kidnapped?"

"Have someone just held a grudge against his family?"

"How you can be so sure about that?"

"I'm feeling pity for his parents, I hope he's safe"

Genya only stared at his classmates who have talked about the disappearance of their fellow classmates, Keisuke Minamoto. He currently stood alone near the window, as he was watching the outside.

Several days before his disappearance, Keisuke's behavior changed drastically. He became more quieter than before and rarely talked with everyone in contrast of his usual cheerful and bubbly expressions. His classmates even asked if something bad happened to him, yet he only choose to remain silent. And because of this, all of his friends were begin to feeling worry about him since then.

"Genya!"

Genya then noticed someone was addressing him. When he turned his face, it was Yae, one of his close friends.

"Yes?"

"You're not busy, right? I need some help right now" Yae requested.

"Okay" Genya nodded as he then proceeded to help Yae.

Well, no one knows what really happened to Keisuke. However, there may be another possibility if his disappearance actually have something to do with someone...or something unnatural.

To be continued...