(Quick Note- This will be a shorter story because there's not a lot of Cobra Kai by themselves in The Karate Kid. I'll add deleted scenes and make a few of my own.)
You follow Johnny Lawrence on your motorbike to the beach. You're being closely followed by your other friends, Bobby, Tommy, Jimmy, and Dutch.
You all come to a stop at the entrance path of the beach.
Johnny: That was awesome!
Tommy: Brew time.
Tommy reaches into his pouch and gets a few beers.
Tommy: Who's for a warm one? Here you go.
Johnny: No, I pass man.
Tommy: Hey, Bobby?
Bobby: No thanks, pal.
He then turns to you.
Tommy: Y/N?
Y/N: Nah, I'm alright. I mean, who the hell wants a warm beer?
Tommy turns back to Johnny.
Tommy: Johnny, who are you kidding, man? You're still the ace degenerate.
Johnny: No, Ex-degenerate, man. Eight a.m. tomorrow, I'm a senior. I've got one year to make it all work. And that's what I'm gonna do. Make it work, all of it. Right?
Bobby: That's right man.
Y/N: You know it.
Johnny daps you and Bobby up.
Tommy: You must be a trendsetter, Johnny. Looks like everyone's doing something new.
Johnny: What?
Tommy: Take a right. Check it out.
You all look down at the beach and see Johnny's ex Ali Mills doing keepie-ups with some dude.
Y/N: Hey Johnny, forget it, man.
Bobby: Yeah, it's ancient history.
Johnny: Who told you, man?
Bobby: Johnny!
Johnny puts on his helmet.
Tommy: Hey man, I thought they broke up.
Bobby: She did.
Y/N: He didn't.
Johnny starts riding down the hill and you all follow closely behind.
You see Ali kick the ball away and the kid runs after it.
Johnny gets down there first and gets off his bike.
Johnny: Hey, Ali, I want to talk to you.
Ali: Just leave me alone. We've been over all this, alright? I don't want to talk.
Johnny: Well, I want to talk to you, alright?
He turns off her radio.
You take off your helmet and walk over to your girlfriend, Bailey Morgan, one of Ali's friends.
Bailey: Hey.
Y/N: Hey.
You kiss her.
Bailey: He still won't get over it.
Y/N: Unfortunately.
Ali turns her radio back on.
Johnny: What is your problem?
He turns it back off.
Ali: Look, why don't you take your little Cobra Kai's, and get out of here.
Ali gets up with her radio.
Johnny: Oh yeah right.
Johnny gets up too and takes it out of her hands.
Johnny: And that's gonna solve everything.
Ali: Give me my radio.
Johnny: No.
He moves out of the way.
Ali: I said, give me my radio.
Johnny: You promise you'll talk to me?
Ali: Yes, give me my radio.
Johnny: You promise?
Ali: Yes.
Johnny gives her the radio back.
Ali starts playing music right away and Johnny grabs it and throws it to the ground.
Ali: You just broke my radio!
Johnny: Yeah.
The kid goes to pick it up.
Johnny: Don't touch it, punk.
Kid: No, this is yours.
He picks it up and goes to give it to Ali. But Johnny grabs it out of his hands.
Y/N: It's about to go down.
Kid: What's going on?
Johnny: You want it?
Dutch: Whoop this derp, Johnny.
Kid: Yeah, just give it—
Johnny pushes the radio into him, and the kid falls to the ground.
Tommy: Alright!
???: Come on, Daniel.
Jimmy: Get him, Johnny.
Johnny moves Ali out of the way, and Tommy and Dutch hold her back. He also rolls up his sleeves.
Daniel runs at him, but Johnny sticks out his leg and makes Daniel trip over.
Ali: Johnny, stop it!
Daniel runs at him again, but Johnny sticks out his leg, once again, causing Daniel to trip.
Ali: Stop it!
Johnny: I didn't do anything.
Daniel gets up and goes into a rookie fighting stance.
Johnny gets into his and kicks Daniel down.
Ali: You're a big man now, huh?
Johnny: Look, you started this. All I wanted to do is talk to him.
Ali: Well, leave him alone and we'll talk.
Johnny: Yeah, where did I hear that before?
Johnny walks up to the downed, Daniel.
Johnny: How about you, hero? Had enough?
Daniel, out of nowhere, sucker punches Johnny in the nose.
Johnny's nose begins bleeding and Daniel's buddies get hyped up.
Daniel gets back into stance.
Daniel: Okay. Okay, man. Now we're even.
He sticks out his hand for a handshake.
Johnny: No mercy, man.
Johnny gets into his stance and takes down Daniel in three hard strikes.
Johnny walks off.
Y/N: Let go of her, guys.
Dutch and Tommy let go of Ali and she starts lightly swinging at Johnny's chest.
Ali: Why don't you hit me?
Johnny: It's your fault!
Ali: It's not.
Johnny: It's your fault.
Ali: Ever think it's yours? Why do you always have to fight?
Johnny: Bullshit.
Johnny ignores her.
Johnny: Get on your bikes, guys.
Dutch daps up Johnny.
Bailey: So much for a nice date on the beach.
Y/N: We'll have a date soon. You look great by the way.
Johnny: Come on, Y/N.
Y/N: Sorry, got to go.
You get on your motorbike.
Y/N: I am loyal to my leader.
She kisses you.
Bailey: I know.
You put on your helmet and follow the rest of the group.
Dutch runs over Ali's radio. You and every other Cobra Kai drift dirt on Daniel.