They aren't really that similar, but the main characters of Light on Me did a Cameo on Best mistake, (Episode 4). Both are really cute short shows though, and worth the watch.
3rd season of the show. Different characters in a similar, yet different scenario. Episodes are short and sweet. Definitely worth it to watch.
Between Friendship and Love 3 is obviously the third season of the show. The episodes are short and sweet, but still convey the story well. Again, different characters but similar stories. Two people who live far from one another.
Second season of the show. They have different characters, but kinda similar scenarios? The first one is about two people who work together and live far apart, the second one is about friends who live far apart.