Here is a translation but you can also just wait for the video with English subs.
-Near SNSD’s Waiting Room-
Jeongmin: What did I say? Jajaja~ I got the autograph! Please cheer for me!
Jeongmin: I got the autograph! Thank you!
Jeongmin: I got it! Hyung! I got the autograph! “Donghyun Oppa” is written there.
Donghyun: Who signed this?
Jeongmin: It’s Yoona sunbaenim’s signature.
Donghyun: You printed this from the internet, right?
Jeongmin: No, no, no! It’s real. And the designs over here are done by Taeyeon sunbaenim.
Donghyun: I’m still suspicious.
Jeongmin: No! I really got it signed.
Donghyun: The words over here aren’t the same. I don’t believe this.
Jeongmin: I don’t believe this.
Donghyun: Did you film it?
Jeongmin: Yes, of course. I filmed it at the waiting room.
Donghyun: No, I mean the part while they were signing.
Jeongmin: Aigoo, you can’t film while they’re signing it.
Donghyun: (To the other members) Do you think this could be from the internet?
Jeongmin: Ah, really, this is real.
Donghyun: I will keep this well.
Jeongmin: Thank you, so the mission is successful!
Donghyun: You did well, you did well. (Hugs Jeongmin)
Jeongmin: So my mission is successful.
Donghyun: Yes, it’s successful.
-While filming the MV for Pink Romance-
Jeongmin: Kwangmin is very tired. Kwangmin became troubled.
Jeongmin: Today, today is tiring.
Jeongmin: Ah, it’s cold! It’s so cold!
Kwangmin: Wearing the Pikachu costume..
Minwoo: Giving a heart while performing live..
Jeongmin: First, he should wear the Pikachu costume to the beauty salon.
Minwoo: How about Kwangmin as Ash Ketchum and Donghyun as Pikachu?
Kwangmin: Am I supposed to receive the punishment as well? No, I don’t want to be punished.
Jeongmin: Listen. Donghyun hyung will wear the Pikachu costume and go to the beauty salon. Then you will order him around there.
Hyunseong: Order him around, like “Go, Pikachu!”. You’ll just have to say “Go, Pikachu!”
-A few days later at M broadcast station-
Minwoo: This is..? Broadcast station. The reason why I’m holding Donghyun hyung’s camera is..
(Shows the sleeping figures of everyone who practised overnight)
Minwoo: Everyone collapsed. (Films Jeongmin) Hyung, why is your cheek pink? You look like you’ve put on makeup.
“Sleeping” Jeongmin: Ah, I put on makeup already.
Minwoo: Donghyun hyung who sleeps till he doesn’t know what’s going on around him.
-A few hours later-
Minwoo: Wearing that clothing on stage.
Kwangmin: Then you’ll have to exclude me.
Minwoo: Why? It’ll be funny.
Kwangmin: No, it’ll be bad.
Jeongmin: So there’s no punishment now?
Kwangmin: Wearing the Pikachu costume and go out now?
Minwoo: Is my suggestion not good?
(Donghyun refuses to look at the members’ in the eye)
Youngmin (who’s holding the camera): Donghyun hyung, should I switch the camera off for you?
Jeongmin: We have a cow costume at our dorm.
Kwangmin: How about giving out milk while wearing the cow costume?
Minwoo: Giving out milk~
Donghyun: I won’t do it.
(Youngmin films himself)
Jeongmin: Say something!
Youngmin: Will Donghyun hyung succeed?
Hyunseong: If he fails, then there’ll be five. One from each member.
Donghyun: To be honest, I am speechless at Hyunseong. I have to be mad at Hyunseong.
Donghyun: I’ll do it well.
-The day when Hyunseong rode the bicycle-
Youngmin: Hyunseong hyung is riding the bicycle today.
Jeongmin: The one who’s left behind.
Minwoo: Ah, are you shopping?
Jeongmin: Ah, the weather is nice~
Minwoo: It’s nice~
-In front of a convenience store nearby R beauty salon-
Minwoo: What is this.. Hello!
Donghyun: Today, I’m not Boyfriend’s leader. I’m a cow.
Donghyun: Do you see the cow buying milk? Because I have the fats of a cow.
Donghyun: Stop laughing already.. If the cow feels ashamed, it won’t produce good quality milk.
Donghyun: Ah, the cow is ashamed.
Minwoo: Ah, I shouldn’t laugh. There’s even a tail.
Donghyun: (Grabs the tail) It’s a tail?
Minwoo: It’s a tail. We filmed this in front of our dorm. (Laughs) What do I do..
-Donghyun walks in-
(Hyunseong and Jeongmin laughs)
Donghyun: My life is over.
Jeongmin: It suits you a lot.
Minwoo: It’s not really good.
(Jeongmin continues laughing)
Minwoo: I’ll switch the camera off for a while.
-After a while-
Jeongmin (Camera holder): Donghyun hyung who is giving out milk so that everyone will have a warm winter. He’s giving out milk he produced himself.
Donghyun: I will buy a lot. The cow feels very ashamed.. Please drink some milk.
(Donghyun gives out milk to everyone, then spots Kwangmin)
Donghyun: Oh, here’s a friend. (Gives milk to Kwangmin)
Kwangmin: Ah, thank you.
(Donghyun goes to change)
Jeongmin: Mission accomplished!
Donghyun: My heart hurts.
-Fanmeeting with Bestfriends-
Jeongmin: Everyone, you’re feeling very cold, right?
Jeongmin: Then let us make you feel warm!
<I’ll Be There’ MV unreleased parts>
Source: boyfriend-champion on tumblr