Sorry it has been so long since I updated this story!
Yukio looked around. Everyone was starring at them.
"What?" He asked.
"Only HALF human?" Izumo asked.
Yukio sighed.
"Our father is a demon... Along with Kuroi"
Yukio turned to see Rin looking at him angrily.
"You too?"
"How do you know her?"
"I met her on a mission!"
This time Bon asked, "And Mephisto is your half brother too?"
"Yes... Just-" Yukio sighed, "I will explain in class tomorrow, just wait until then"
"Are you a-" Izumo started.
"Wait. Until. Then."
Kuroi looked up.
"Sorry, big brother..."
"It would've happened sometime...," He rubbed his forehead, "You are fast though. I am not forcing you, but the offer I made when we first met still stands."
"Actually, that's one of the reasons I am here. I want to do it."
He smiled. "I look forward to it."
o0o
"Do you have flames?" Rin asked Kuroi that night.
"Of course she does," Yukio said, "Her power allows her to travel in and out of Gehenea and she just keeps her flames there."
Kuroi nodded, agreeing with him.
"Why did you come?" Rin asked.
"To follow up on an offer."
"What offer?"
"The one Onii-san made when we first met," Kuroi finished eating her dinner and she yawned, "I am really tired. I am going to go to bed now."
"Okay! Goodnight!" Yukio called after her as she waked away.
"Who is she?" Rin asked.
"She is our little sister."
"With 'him' I presume?"
"Correct." Rin and Yukio walked up to their room. To their surprise, Kuroi was snuggled up on Rin's bed. Yukio laughed.
"I guess you are sleeping on the ground tonight."
o0o
Yukio started class the next day (Before anyone could say anything) by saying, "Now, someone very experienced in the field will be joining our class. They are only twelve and not so good with paying attention to classes. I want you to welcome them all the same."
The door opened and Kuroi stepped out, wearing a black skirt and a tank top.
"Hi," She muttered," My brother gave me and offer. And I took it. My name is Kuroi Hana and I am excited to be in this class with you!"