The announcer also has a cheery voice..lol.
What a great way to confuse all of us huh. lol. Well they always have this cheery narrator throughout the whole showcase of new lakorns each year, whether the lakorn is dramatic or comedic.
From mixing insights from Kom Sang Koo Som magazine, TV-Inside, Rak Dara (TV news)...
I don't know what Kelly's character did to Kob's character "Rung" but after unfortunate love with him. She start restricting her sisters to fall in love or be with any guy, but they secretly do it behind her back. This causes Nok's character to get pregnant to Sun, which Kob falls in love with and later finds out it's her nephew, she goes insane and dies...BUT...as a ghost she still continue to haunt and taunt them, doesn't seem like she want love to exist in the world. lol.
I won't guarantee that this will be the actual story though, it might change.
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Here's a video of Kob giving a bit of an interview about "Reun Sawn Ruk":
http://www.youtube.com/watch?v=TdvALP7_CIg
She says she's already killed a person in the first two episode. This na'ek'rai will be cruel and evil.
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Koo Sang Koo Som - Cover (Kob and Kelly)
Credit: All About Kob and Popcornfor2 Forum