I Don't own any of these characters Only my OC

Tensei Shitara Slime Datta Ken is made by Mitz Vah and RWBY is own by Rooster Teeth.

Earth

County: Japan

Timeline: 2018

?: (Thought) Ah a beautiful day in Japan. My name is Satoru Mikami and i am 37 years old and i am a Virgin hasn't got a girlfriend, but it not easy to have a peaceful life (Sign).

?: (Waving at his Friend) Hey Satoru-Chan over here.

Satoru: Hey there Tamura did you get what i need for the data?

Tamura: Yeah but some of the data are almost done but i has a new Fiance(Revel his fiance) her name is Miho Sawatari.

Miho: Hello Satoru-kun my name is Miho Sawatari.

Satoru: I didn't know that you have a Fiance there Tamura.

Tamura: Well you told me to confess to her.

Satoru: True but what are we having for dinner..(Saw people grasp) Huh?

Tamura: (Grasp).

Satoru: (Thought) Shit (Push Tamura and took the Knife to his chest) Damn what is this heat from this knife?

?: Scanning for any sub particular matching found one.

Tamura: SATORU-CHAN No please stay with us.

Satoru: (losing an amount of blood and slowing fainting) Sorry...Tamura(Eye close)

Tamura: SAAAAAAAAAAAAAATTTTTTTTTTTTTOOOOOOOOOOOOOORRRRRRRRRRRRRRRRRUUUUUUUUUUUUUU!

In a Different World

?: Ugh what happened where am i?

?: What is this place and Where is Yang Blake Wiess at? The last thing I remember was reunited at Haven Academy, but after that what was that strange light that blinds us?

Flashback

?: Ruby (Crying) I-I am so sorry that, I left you and the other back at Beacon. I didn't want any of you to get hurt by my..(Got hug by Ruby) Ruby?

Ruby: I know things have been different since the Fall of Beacon but we are a team Blake.

?: Yeah Blake we stick together to the better end no matter what get our Way Team RWBY Will be on the case (Smile).

Ruby: Huh what that? (See an unknown Light heading to them)

?: It looks like...(Eye Widen) We need to move now before that..(All four of them was brought into the strange light)

Present

Ruby: I guess whatever that strange light was it must have brought my friend into this unknown area. Maybe I can call them with my Scroll maybe that could work...(Bring out her Scroll and low signal) Damn barely a signal got to find a way out of here. (Walk around the Cave)

Time Skip

?: So you are going to be named Tempest Veldora is that cool with you?

?: (Roar in excitement) THAT SOUND BADASS I LOVE ALRIGHT THEN MY NAME IS VELDORA THE STORM DRAGON!

?: (Sweatdrop) Nice to know you like the name.

Veldora: But i still wish to be free behind these Cursed (Sign) Dammit i knew i shouldn't let my guard down in the War back of those thousand years ago. Now I am slowing dying by my own magic.

?: What if i can eat you and you can live inside me? will that work?

?: Correction you can eat him with using Predator.

?: You sure Great Sage?

Great Sage: 100% percent test you can now use Predator on Veldora.

?: Alright Veldora here goes (Jump above Veldora and use his Skillcall Predator) PREDATOR!

Veldora: Thank you, Mikami you are truly a best friend i only has. (Inside Mikami body)

Great Sage: 100% percent he is fully safe.

Mikami: Since i have eaten Veldora. I need to think of a name when i go out of the world...(Thinking of a new name and found one) Oh GOT IT Rimura Tempest it going to be my name for now on.

?: Warning someone is heading in this direction.

Rimura: Where?

Ruby: Hello is anyone there? I am kinda lost and need a way back to Haven Academy (See a Slime and cute face Rimura) Oh hey there little guy aww he is so cute.

Rimura: (Got grab by the Red-Hair Women) Say what is your name?

Ruby: (Eye Widen) A Slime that can talk that even make it cool and weird at the same time.

Rimura: Also what world are you from? Because i don't think i have seen you from my Earth.

Ruby: Oh Sorry (Rubbing her head of embarrassment) My name is Ruby Rose. And Also have you seen my Sister and friend? Where am i?

Rimura: (Thought) Seem like she doesn't know what is this place is at?

Rimura: My name is Rimura Tempest Follow me.

Ruby: Okay. (Follow the slime)

Time Skip

Ruby: So tell me a little bit about yourself?

Rimura: What do you mean by that there Ruby?

Ruby: What kind of Grimm are you?

Rimura: What is a Grimm?

Ruby: (Eye widen) You has never heard of a Grimm before?

Rimura: What are they exactly?

Ruby: They are like..(Hear a door open) What was that?

Rimura: Sound like a door come on.

?: Strange that unknown presence is gone. I wonder where did it go?

?: We should look around there should be no way in hell it can't be gone.

?: Alright i am going to use my stealth move (Cast his hand) Cloak.

The first one he has Blonde-brown hair. He also has golden eye he has a black jacket with a shoulder armor pad on his right side and a arm armor to his right arm. Then has a sword on his back and he has a brown fur around his waist with brown pants. He has gray combats glove and he has black legging and brown adventured Shoes. His name is Cabal,

The second one he has brown short hair with a dark maroon bandana on his head. He has a brown leather shirt underneath with a green t-shirt he has a black glove. He had a brown belt around his waist and he has gray pants with brown shoes, his name Gido And the last member of their group.

She has long blond hair with a blue ribbon around her hair she has a light pink long sleeve shirt with white cleave on the stomach area with a brown below her waist and she has a pink skirt with black long boots her name is Elen.

Rimura: Hm? Who are they?

Great Saga: Status unknown.

Ruby: hm what wrong?

Rimura: Nothing much come on Ruby let see what is the outside world looks like.

Ruby: (Nod)

Rimura: (look back and head out of the cave)

Elen: Huh?

Cabel: Hey what up?

Elen: Nothing i thought i hear something just now.

Gido: Hey you two coming or not?

Somewhere else

?: Ugh...(eye-opening) W-What (Standing up) how am i alive? I should be dead.

?: (walking out of the camps) This camps i wonder what or who made this campsite?

?: Ah Miss you are awake how is your recovery?

?: Very well (See a harmless Goblin Chief) are you the leader of this camp?

?: Yes but we have our stronger warrior who dies protecting this Village of our even my first son Rigur.

?: I am sorry to hear that mister...

?: Sorry but we don't have a name for ourself among my people.

?: You don't? Strange well can i help out and your village?

?: Of Course, you can but we want you to know that there are Direwolf who come at our village during the night.

?: Don't worry i can protect you and your village.

?: Thank you but i hasn't ask what is your name?

?: My Name is...(Screen go black) Summer Rose.

Next time on RWBY Datta Ken

Ruby: Hey guy Ruby here (Eye widen) M-Mom is that really you?

Summer: Yes Ruby oh my i never knew how much my little rose has grown.

Mother Rose and Daughter Rose reunited

Ruby: Stay back Mom I got this one.

Some of you may ask if RWBY and Tensei Shitara Datta Ken Would make some Crossover with the Anime, yes but there is going to be two things that are going to be adding in this story Team RWBY will be divided into the 4 nation Ruby and Summer are going to be in Jura Forest. Secondly is Weiss in Dwargon Kingdom Thirdly Blake with the Jura Forest but in the Swamp Area and Lastly Yang in Brumund Kingdom also lastly might add a few more RWBY Character in the Story staring with Pyrrha, Maria as Young Age version, Penny, Jaune, Nora, Ren Lila, Raven. Those are the only character who is going to be added in the story. If you have any request on the RWBY and That time I got reincarnated as a Slime Fanbase. Please let me know and if you have a question about this story, there will be no OC or any kind of OP Ability that RWBY Or any other character besides, Ruby, Summer, Maria they will get new awakened with their Sliver-eye Power that is all you need to know and i will talk to you guy later DARKSONIXKILLER OUT!