I don't own anything.

FYI, in this story Yunoki didn't have any connection with them!
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Day 1

In a large room in some place, specifically in Japan, sat four boys, two with annoyed faces, one with a confused one and another boy who was sleeping. They were called for no reason by their homeroom teacher, Kanazawa-sensei, to come to that place in their summer holidays. He didn't even care about their personal plans, it was by luck that they decided to come. Looking around, Tsuchiura and Tsukimori quirked an eyebrow. That room DID look like a classroom, except for the monitor in front of the class. About five minutes later, the door opened and made them almost jump from their seats. A purple long-haired guy stepped in with four thick books. Standing in front of the class, he smiled as he introduced himself:

"Good morning. I'm Yunoki, and from now on I'll be your mentor…", the guy smiled as he put the books on the table.

"Okay, since it's our first…" Before the mentor could continue, Tsukimori cut off:

"Wait! A mentor? What for?", he asked frowning.

"You came to the 'Be a Man Association' class without knowing the purpose?", the guy asked back. Hihara and Tsuchiura shook their heads.

Sighing deeply, he explained: "As I said before, my name's Yunoki Azuma, and I'm a member of the 'Matured Men Association'. In this context we're not talking about the real 'mature', meaning… I believe you didn't register yourselves. Someone did that for you?"

Hihara nodded in agreement, "Yup, our sensei."

"I see… The 'Matured Men Association' is where the men who finally became a real man gather. And this class is here to help those who are still a 'lamb'."

"Huh?", said the three older students.

"I see you guys are lambs. I was right to bring these books." Stepping forward, he began to give each one of them red books, which were titled 'Icha – Icha Paradise' (for those who watched Naruto must know this).

"I borrowed those novels from my friends yesterday. Since you guys are 'innocent', you'll have to learn about our subject through reading first.", the guy explained smiling, as Tsukimori and the others looked at the novels confused.

"Okay, those novels will be your homework, so make sure you read the entire book. Today we will be introducing ourselves and end the class. Starting from the green-haired boy, please.", Yunoki said as he pointed at Hihara.

"H-Hai! Hihara Kazuki. 3rd Grade in Seiso Gakuin, Class 3-B!!"

"Tsuchiura Ryotarou. Seiso Gakuin, Class 2-5…"

"Tsukimori Ren. Seiso Gakuin, 2-A."

"Shimizu Keiichi…Seiso Gakuin…1-A…"

"What a coincidence, I was in Seiso too. Well then, nice to meet you, my kouhai.", Yunoki said as he smiled. He was smiling, but for an unknown reason his kouhai were shuddering.

End the 1st Day.

A/N: Well, I dunno if this is good enough, but I tried. Anyway, this is only the 1st day of introduction, so you'll have to wait for the 2nd day to see how our mentor works.