Found this funny and interesting video, but really had no idea on how to share this here, seeing as it's all in korean with no eng hardsubs. There is a translation script and better description of what's going on courtesy of Allkpop.com, but I think it would be a bother to post all in the notes section, so I'll just leave it here for all to watch.
From Allkpop
"This Korean internet celebrity has the ability to do an uncanny impression of a Korean female voice! He's so good, that he's got both guys and girls confusing him for a woman through his prank calls above.
Going by his channel name RanmaTV, this guy does a live, video streaming broadcast on the famous Korean streaming website AfreecaTV. AfreecaTV stands for 'A Free Casting TV', and it's a place where users, called BJs or Broadcasting Jockeys, can hold their own live, web shows. There's many viewers on the RanmaTV channel as he specializes in imitating different voices, and he calls his viewers or other AfreecaTV users to either prank them with his talents, or talk to them about voice acting.
In the video above, Ranma calls an unsuspecting, nervous AfreecaTV user and poses as a girl with a boyfriend problem. The conversation starting at 0:10 seconds goes like this":
Caller: [You're asking] what am I good at?
Ranma: Yes.
Caller: Listening to people.
Ranma: Oh you're good at listening to people? Um, well my boyfriend is pretty aggressive. He's pretty severe.
'Boyfriend': Hey, what are you doing?!
'Girl': Ah, ah I'm just talking….
'Boyfriend': You crazy?
'Girl': Ah, why are you like this? (To the caller) Ah, I'm sorry.
Caller: Um, I'm kind of scared.
Ranma: Oh what's scary? Don't worry. Should I give the mic to my boyfriend?
Caller: No. He seems scary.
Ranma: What's scary [about him]?
Caller: You said he was aggressive!
Ranma: Oh no, he's not aggressive~.
Caller: If he's violent I'm going to block him.
Ranma: (to the 'boyfriend') Hey, you want to do this?
'Boyfriend': What? What is this? (To the caller) Hey, who are you.
Caller: Yes, hello?
'Boyfriend': Hey, what were you saying to this girl? What were you guys talking about?
Caller: We were talking about you.
'Boyfriend': You were talking about me? (To the 'girl') What were you saying about me?
'Girl': Oh, nothing~.
'Boyfriend': What were you guys talking about?
Caller: She was saying a lot of good things about you, I was listening to her.
'Boyfriend': Good things? She was saying good things about me? Tch!
'Girl': No~.
'Boyfriend': You know, she and I have been together for a long time. So don't cling on to her okay?
Caller: Yes, I understand.
Ranma: (as the 'girl') Uh, yes. I'm sorry. He's crazy. I'm sorry.
Caller: Yes, I won't cling on to you.
Ranma: Uh, yes. So. He's crazy, he's a crazy bastard.
'Boyfriend': What? Be quiet, I told you to go away.
'Girl': Ah, why? You go away!
'Boyfriend': Ahem, yes. So, don't touch her.
Caller: Yes, I won't.
Ranma: (as the 'girl') Yes, work hard [on your broadcast].
Caller: I will.
Ranma: (Call ended.) Wow he's really nice.