At first I thought the song had to do with with the animation. But now I see you self made the love story after seeing some text and read the plot :P.
The music kinda for my opinion, fits with the animation.

The animation style from South Korea. I kinda liked it, but the legs looks like stick legs, after seeing the catboy running. The animation is smooth.
The graphics are very simple and childish, but so good and so cute.

I also kinda liked the story. In the beginning I thought the catgirl was very arrogant, because of the way she reacted to him, with that face. In the plot you write that she is a nice girl, but I don't see that really in that flash. I only see that she is walking away from him like he is kind of freak.
Later on, you make that up. I really love that scene when he is running to her with a text that he loves her. She is looking shy and is blushing.

Glad there is a English translation, or otherwise I wouldn't understand what she is singing.

I liked the graphics, it's very good. Loved the face expressions. You did a very good job to make this a happy and colorful flash, exactly what it should be if it is a New Year.

Animation is very smooth and the lip sync, it did go well with the song.
I especially liked that blinkin eye from the people. It really seems that the things that are happing in the flash, really means much to them. But that's what I am thinking.

What noticed me are the arms from the girl. She really like to move with her arms, especially when she is walking and when she is congratulate.
That's what I noticed, it is pretty funny.
But with the flower scene, it seems the lady who gives the flower to the girl, she's is not moving with her arms. It's just like she is using telekinese to give it to the girl.

The music is very happy and catchy. The text especially fits with the animation.

Overall, this flash is really good. It's a nice flash to watch anytime.

You are surely right. There is no reason to flag the Hitler flashes, because they do not violate the rules.
You made right points why this should not be flagged.
You can be a good teacher, to teach about the portal.

I love it. This is the prove you worked hard on this song. The beat is really kewll.

This remix is kewll. The beat rocks and I love it. Why don't you let chef sing his song ^_^.

So that funny music is yours, man, I love that song,
it's funny with that funny voice