- Funny Moments: In the ending, when Yun-lee and Dong-whi start dating and it's Sealed with a Kiss, Dong-whi runs off giggling and shouting "Noona is all mine now!"
- Heartwarming Moments: Too many to count, but particularly the ending when Yun-lee and Dong-whi start dating.
http://tvtropes.org/pmwiki/pmwiki.php/YMMV/NineteenTwentyOne
FollowingYMMV / Nineteen, Twenty-One
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