Yesterday I'mI was in LA~

Yesterday we went to LA! :)
We ate kimchi cream pasta~ It was so yummy!
Our last plan was going to the last book store~ I got this Pippi Longstocking comic book at the book store~
TodayYesterday(**) was really good~X^D

**It's not clear when you ate kimchi and went to the bookstore, so if you were in LA for multiple days or are still there, Today would make sense :). So depending on what you meant to say, "Today" could be correct.

Yesterday I'm in LA~

Yesterday we went to LA! :)
We ate kimchi cream pasta~ It was so yummy!
Our last plan is going to the last book store~ I got this Pippi Longstocking comic book at the book store~ 

Today will be really good~X^D