* These two are Kim Seon Ho’s representative works
* Beautiful music
* Similar shooting/production technique
* Both are the growth story
* Both feature 'Halmeoni'
* Both may make you cry
* Both feature hand-written diaries/letters
* Poetic
* Remarkable golden words
* (More...)

In addition to the above, someone might treat Hometown Cha-Cha-Cha as Season#2 of Kim Seon Ho's story. There are many fan-made pictures of the 2 TV shows to relate Han Ji-pyeong and Hong Banjang's past. And this situation adds a lot of entertainment.

There are so many common features on the two TV shows:

1. Sweet scenes, lots of
2. Make you fall in love
3. There is no bad guy but just relaxing
4. Feel good and laughing
5. Fate
6. Both male leads have trauma in the past
7. Family and friendship
8. Stories of second leads are also sweet
9. Man leads are very charming
10. Super expensive sport cars (haha)
11. The clothing...
12. (more...)

There are also some minor differences:

1. The storylines of Secretary Kim are much simpler than Hometown Cha-Cha-Cha's.
2. One is in the big city and the other is in a small seaside village.
3. One is with the finance magnate and the other is not.
4. One may make you laugh and cry and the other will only make you laugh.