Forewarning there will be talks and references to self harm and depression.
Yang pov
Yang: "Guys I can't wait for everyone to see (Y/n), especially us Ruby its been so long!"
Ruby: "Yeah it has the last time we saw (Y/n) was when he moved away."
Yang: "True... I remember how much of a crybaby he was at times. That and you had such a huge crush on him."
Ruby: "YANG!!! SHUT UP!!" She shouted growing red as I laughed at her.
Weiss: "Can you tell us about this... (Y/n) was it? How long has it been since you saw him last?"
Ruby: "Yeah we should probably explain... Well we've known him since... Does 12 years sound about right Yang?"
Yang: "Yeah give or take a year or two that sounds about right."
Ruby: "Well from what I remember he was the kind of kid that made everyone happy even though he was really shy."
Yang: "Yeah he always cried when someone picked on him but me and Ruby would put a stop to it." I said as we continued to retell them the details we could recall of our childhood friend. I saw Weiss eyes light up a bit when we talked about what we could remember about his personality. I saw the same light in Ruby's eyes and a slight blush. I knew her crush never faded away it might have even gotten bigger.
Blake: "I'm wondering why is he just not visiting?"
Yang: "We all agreed to write as much as possible but when a week past we realized we never told (Y/n) our address or learned his. So yeah... Our fault."
Blake: "Good job... Anyway who do you think the new teacher is?"
Ruby: "Actually that's a good question he is coming today as well... I wonder if we will meet both (Y/n) and the new teacher."
Yang: "Maybe?"
Ruby pov
???: "Excuse me I'm here for the teacher position at Beacon are you perhaps team RWBY?" A male said behind us as I listened to his voice. It sounded so familiar but also so different. We turned to see the man. He had (h/c) hair, deep (e/c) eyes. He pushed his glasses up giving a shy sort of smile as my jaw dropped. "I'm (f/n) (l/n) here to teach at Beacon."
Ruby: "Oh my god... (Y/n)?"
(Y/n): "Yes that's me but who are... Wait yellow hair with lilac eyes, black tipped red with sterling silver eyes... Yang? Ruby?" He asked staring at us as we nodded. He dropped his suitcase and other bag pulling me and Yang into a hug smiling. We returned the hug absolutely astonished it was him.
(Y/n): "I'm sorry it's been so long."
Yang: "It's fine... Geez if you had changed your hair we would have never recognized you seriously what happened while you were gone?"
(Y/n): "Eh some bullying, cutting, a little depression, and a lot of resolve."
Blake: "Wait your here to teach at Beacon yet you look younger then Yang how old are you?"
(Y/n): "I was wondering when someone would question that. Yeah I'm here to teach and im 17. When you are determined to show your potential you can do amazing things... Like graduate from Atlas academy two years early... But now is not the time I have to see Ozpin about my job meet me outside his room in an hour please." He said picking up his bags giving me and Yang one last hug before rushing off.
When he rounded the corner I couldn't stop staring at that corner. He was so cute when we were kids and now... He is handsome and still so cute...
Yang: "Is my sis still crushing on (Y/n)? Cause I see a massive blush on her face that says she is."
Ruby: "...m-maybe..."
Blake: "She isn't the only one." She said as me and Yang looked at Weiss. She was bright red like me staring at the same corner. We all laughed a little heading to the dorm.
(Y/n) pov an hour later
I knocked on the door Ozpin had said belonged to Ruby's team. I waited patiently with my bags as Yang opened the door. She stared at me then face palmed apologizing as I chuckled telling her it was fine. She let me in as I thanked her explaining why I came here to everyone.
Ruby: "Wait so your staying here?"
Weiss: "With us?"
(Y/n): "Yes but it's only temporary now I feel I need to explain some stuff don't I?"
Ruby: "Yes... You said something about depression earlier..."
(Y/n): "Ahh that well let me also answer about the cutting." I said holding my arms out one at a time pulling up my sleeves showing the numerous scars going up and down my arm. No one said a thing. "After about 2 years when I moved away the bullying got so bad I started cutting myself. No one knew and i fell into a deep depression. That was how I was until 2 years ago. You see I heard from my father that my friend Yang was in the newspaper along with Ruby. I read the article saying how you two were some of the most promising huntresses to be. And I looked at myself in the mirror and decided from that day on i would put all my efforts to becoming the best hunter I could. And well I got here with my resolve and determination." I said going on to talk about everything that had happened as we caught up and I learned about the other two.
The next day
(Y/n): "Hello students I will be your new teacher starting today. Please call me either Mr. (L/n) or just (Y/n)."
Jaune: "U-Uh sir... Arent you the same age as us?"
(Y/n): "Yes I am... Uh..."
Jaune: "Jaune, Jaune Arc."
(Y/n): "Well Jaune I went to Atlas and graduated 2 years ahead of others. And yes I am certified to teach here. Now if I may start the lessons." I said turning around opening a book turning to a certain page. But as I went to speak a spitwad hit the back of my head. I turned around to see a bigger kid chuckling to himself. I grabbed my attendance sheet looking at his seat.
(Y/n): "Cardin was that you?"
Cardin: "No sir I'm innocent."
Jaune: "Yes it was him."
Cardin: "YOU LITTLE SH-" I said but froze in terror as a bullet flew right past his head. He looked at me seeing the barrel of my assault rifle smoking.
(Y/n): "I dont ask much. Don't fight, don't cheat, if you need help ask, and no bullies. Cardin if your gonna bully other students then get out of my classroom I won't tolerate it. Or you could try and make me fear you seeing how I'm not as big or strong as you seem to think you are." I said as he started standing up I saw Ruby and Weiss scared as Yang was ready to fight until I said a few terrifying sentences. "You know at Atlas they teach you every way to kill a man bare handed. They also teach you how to torture them until they kill themselves. Also how to hide a body if need be. Just thought I should warn you Cardin if you want to fight..." I said ominously glaring at him as he froze and sat back down shaking. I smiled returning to my teaching as no more disruptions were had in my class.
Later that night
I walked into my temporary dorm seeing everyone working on the homework I gave them. I chuckled giving them each the answers as they sighed happily.
Yang: "It's so awesome when your friend is the teacher and your roommate."
Ruby: "Totally but... Did they really teach you that stuff at Atlas (y/n)?"
(Y/n): "What?... Oh no none of that but they taught us scared tactics and that was one of them. Trust me the most he would have done would be fall on his ass staring up at me. Im not that shy little kid that you can bully anymore. I've matured, grown stronger, became braver, and accepted my feelings." I said with a slight blush as they all giggled letting out yawns. We all said our good night's as I laid agaisnt the wall wrapping my coat around me falling asleep.
I was awoke from my slumber by the noise of two people moving. I sat up reaching for my miniature scythe until my eyes adjusted to the darkness. I saw Weiss and Ruby pulling a blanket behind them. I eased up watching them as they sat on either side of me wrapping the blanket around us. I blushed slightly then felt my face burn red as they rested their heads on my chest hugging me tightly.
(Y/n): "... u-uh...."
Ruby: "I'm sorry (Y/n)... I cant deny my feelings anymore I love you I loved you when we were kids and I want to be with you now."
Weiss: "And I... May feel the same cause of how they described you and the current you... Your very sweet and caring, but also stern and strick and foreboding if necessary..."
(Y/n): "...well then that was a bombshell that was just dropped right there... Well I love you too Ruby I was crushing on you as a kid but was too shy to admit it... And you Weiss... Well ive only known you for a day but there's something there. So I love you as well now can we sleep?" I asked as they nodded kissing my cheek as I kissed their heads. I was so sorry it has been so long since I was last with Ruby and Yang. But now everything is right in the world.