•Both FL are trying to save the ML
•Both ML are shown as “suicidal” in the first timeline.
•Both ML die in the first timeline but is alive in another.
•Both have highschool and adulthood scenes.
• In Orange the adult FL writes a letter to her past self but in Lovely Runner the adult FL goes back in time.
•Both of these are tearjerkers but Orange is more sad.

So True Beauty Didn’t End Yet but I’m writing this with my knowledge on the webtoon and I’ve watched accidentally in love before [THIS INCLUDES LOTS OF SPOILERS]
Here’s how it’s similar-
~Both Dramas The Male Lead is Admired by others and is very handsome.
~ Both Dramas The Female Lead go through a change
~ Both Dramas The Male Lead falls for the “ugly” side of the girl.
~ Both Drama The Second Male Lead is The Male Lead’s Friend or Ex-friend
~ Both Drama The ML and The SFL is an old family friend.
~ Both Dramas the ML is an Idol or was an idol trainee.
~ Both Dramas are High School/College related.
~ Both are Comedy and Quirky type of shows.
And here’s the difference-
~ AIL’s ML is more outgoing and fun while TB’s ML is more of an introvert and likes to be alone.
~ AIL’s FL tries to become uglier while TB’s FL tries to become prettier.