3 months ago before the 3 of them entered Mato High they had to say goodbye to their friend.
Flashback*
Shino: hey Kaneki c'mon we have all day for all 4 of us lets have fun one last time.
Yuuka: Yeah! Sachi would be sad if you don't come out!
Miku: Onii-chan please come out!
Kaneki: dun wanna! If I don't get out she won't leave!
Kaneki locked himself inside of his room because he didn't want Sachi to leave.
Sachi: Kaneki, please come out...
Kaneki: don't leave!
Sachi: you know that's not possible...
Sachi had to go to a different school far away so her family had to move to be closer to that school.
Kaneki: please... Sob* don't leave...
Kaneki was the one most upset when he learned Sachi was leaving.
Sachi: its not like I'm not coming back Kaneki sigh~, Kaneki I will come back one day.
Kaneki: but what if you forget?! What about you forget about us?!
Sachi: I won't, i promise once i find a way to transfer to back to Shimotsuki we'll be together again.
Kaneki barely opened the door and peeked out.
Kaneki: you promise?
Sachi: yeah! I promise! And don't worry i won't forget about this promise ever!
Kaneki: alright then...
Yuuka: seriously! Kaneki you get emotional pretty easily, but i understand why so I'll let it slide.
Miku: c'mon everyone! Lets go! Let's have some fun together until Sachi-Oneechan at the end of the day!
Shino, Yuuka, Sachi: lets go!
Kaneki: ...
Kaneki still looked depressed.
Sachi: lets go Kaneki it'll be fun.
As he looked at her face he instantly smiled.
That entire day those 5 all bonded.
They played at the arcade, sing at karaoke, dance, eat at their favorite restaurants and they ended it with taking a group photo.
And the time came.
Shino: take care Sachi.
Sachi: I will.
Miku: Sachi-Oneechan be careful alright? Don't trust strangers okay?
Sachi: i will, don't worry.
Yuuka: and if you do in fact talked to someone get new data on them first so you would be safe.
Sachi: Yuuka... that's a bit much.
Yuuka: hehe~ I know I was just joking.
Sachi: so Kaneki... Do you have anything to say?
Kaneki: ... Stay safe and eat healthy alright?
Sachi: I will.
Kaneki: and if anyone tried to hurt you call for me alright? I will come to save you like always.
Sachi: oh Kaneki...
Kaneki: and don't forget about your promise alright?
Kaneki was holding back his tears.
Sachi: I won't forget and also Kaneki do you want a hug?
Grip!*
Kaneki hugged her tight.
Kaneki then began to cry.
Sachi: Kaneki?
Kaneki: Please come back alright?! I will miss you so much! Please whatever happens come back!
Sachi: hehe~ I will~
She the hugged him back.
Sachi: c'mon you girls want to hug too right?
Yuuka: of course!
Grip!*
Shino: Same here!
Grip!*
Miku: We'll miss you Sachi-Oneechan!
They all hugged.
Sachi: mmmh~ this feels so good.
Sachi's mom: Sachi! Time to go!
Sachi: alright, time for me to go everyone. Lets go Miracle!
Miracle: Miracle!
Kaneki: Miracle!
Miracle: Mira?
Kaneki: take care of Sachi for us okay?
Miracle: Miracle!
Kaneki: thanks...
Sachi and Miracle then got in the car.
Then the car began to move.
The 4 also followed as the car started to accelerate and they all had one last thing to say.
Shino: Sachi! Take care alright!
Yuuka: Make sure you take care of yourself! Or you'll never meet Kotori Ai-chan!
Miku: and don't eat too much or you'll get fat!
Sachi: okay!
And Kaneki was the last to tell her.
Kaneki: Sasachi!
Sachi: hmm?
Kaneki: IF YOU DON'T COME BACK WITHIN A YEAR I'LL DRAG YOU BACK HERE MYSELF!
Sachi: pffft! HAHAHAHAHA! YOU NEVER CHANGE KANEKI! I WILL COME BACK! See you guys later!
All 4: see you later! Sasachi!
And that was the last time they saw her.
Flashback end*
Kaneki: no way! I can't believe it! You frickin idiot!
Ryueki: huh?!
???: he's happy?
Mirachi: so you've figured it out? Hehe~ took you long enough!
Mirachi then grabbed her hair and removed it.
Keiko: A WIG?!
She removed the blue hair wig revealing a peach colored hair girl.
Kaneki: It is!
At watchers*
Chikao: it is!
Shino's thoughts*
(It really is her!)
Yuuka's thoughts*
(That was fast!)
Miku's thoughts*
(Its-)
Kaneki ran towards the girl with his arms wide open.
Kaneki: SASACHI!
Sachi: Hey Kaneki!
Kaneki got to her and hugged her tight.
Everyone: HUUUUUUHHHHH?!!!
Kaneki: it is! It really is you!
Sachi: hehe~ missed me Kaneki?
Kaneki: Yeah! I did! It felt like years! I was so lonely!
Sachi: wait lonely? Now that you mentioned it i didn't saw Shita-chan, Miyu-chan and Miha-chan.
???: who?
Chikao: their friends.
Kaneki: they for some reason they disappeared i tried to find them but I couldn't.
Sachi: wait does that mean-
Kaneki: don't worry they're safe, if anything bad would've happened to them i would had sensed it.
Sachi: good, but when I find those 3 I'm gonna rip em a new one!
Kaneki: hehe~ nice to see you again after so long I missed you buddy!
Sachi: hmm! Kaneki are you crying?!
Kaneki: yes! I'm just so happy to see you again!
Sachi: I'm glad you're happy now. But I have something to say.
Kaneki: really? What i it?
???: wait is she going to?
???: confess?!
Sachi: you're it! Come and catch me!
Everyone: EEEEEEHHH?!
Chikao: Haha! Of course Sachi would do that! The game isn't over until one admits defeat.
Kaneki: hehe~! Come here!
Kaneki chased Sachi again all over school.
Sachi: haha! This is so much fun!
Kaneki: yeah! Its been so long!
Natsuki's thoughts*
(He's really enjoying this, maybe I should be her friend too she does look tolerable)
Kaneki: be careful! You might trip!
Sachi: no I won-
Slip*
She was near the school pool so she slipped into it.
Kaneki then stopped to look at her.
Sachi: oh dang it! I'm wet!
Kaneki: hehe~ clumsy as always.
Sachi: Haha, somethings never change.
Kaneki: oh by the way do you have anything to cover yourself? I don't want those creeps starin at ya.
???: who are you calling creeps?!
Sachi: don't worry my clothes aren't see through and i brought extra clothes just in case although they are just my casual clothes.
Kaneki: should I go get them?
Sachi got out of the pool.
Kaneki: don't worry,she got it covered.
???: she?
Flap flap!
Miracle: Miracle!
A giant miracle arrived.
Kaneki: Miracle!
Miracle: Kaneki!
Kaneki: its nice to see you!
Miracle: Rara!
Sachi: well I need to wash and change now.
Kaneki: alright.
Sachi: Also when I'm done can you show me around school?
Kaneki: Roger!
Sachi: Great! Well if you don't mind me can you show me where the girls washroom?
Kaneki: follow me.
Sachi: alright!
30 minutes later*
Sachi: that was good, so Kaneki can you show me around now?
Kaneki: sure.
Itsuki: Kaneki!
Kaneki: oh great its them.
Sachi: who?
Kaneki: what do you want Itsuki.
Sachi looked to see Itsuki which intimidated her.
Sachi then grabbed onto Kaneki's arm.
Sachi: who are they Kaneki?