Recommendations

The Plot is similar main lady falls in love with a rich guy, she falls pregnant and hides it from the main guy. Only difference is she's married to guy to save her family, and her husband is gay.

There two dramas share very similar traits, such as; school based, a romance that starts badly but grows through out, sports and competition. I liked Sassy go go, however I felt like it was missing something that I definitely found in this TTBY. Also, attractive people in both (Just saying ;p).

The way CITT flows is very similar to that of Pinocchio. I feel it is more story based, gears more on the plot than the romance, where as CITT is more focused on the romance. But both dramas gave me a similar vibe. Not to mention both benefit from attractive main characters ;P

both are directed by Shunji Iwai so they have similar melancholy feel and aesthetic. main characters share some character traits and themes about loneliness and human connection.

Both are fantasy dramas and faith has Lee Min Ho :) You get to see time travel and it is a good story.

Both dramas are produced by KBS
Both dramas depicts the life and problems every high school students is facing

it's romance, drama movie, and the struggle of first love and all its obstacles

Spoiler: these 2 dramas have a similar ending both ends but the girl having two choices but the ending never said about what kind of choices they made.

Both movies have the same vibe. Although Han Gong Ju is filmed more darker, Dogami has the same 'based on reality'-topic. Both are 'watch one time only' movies and I found Dogani more difficult to watch. (still wanna cry)

the male lead character knows parts of the future and try to save the girl he will fall in love with.

both deal with the topic how to spend the last days of your life and with whom

Both are about a cop going to a college professor for help in investigations

Both have parents worried about their daughters and frantically trying to save them - both include some strange elements. Both are suspense thrillers.

its the sequel but with different characters
but the female lead in the thumping spike one had a female lead older than the male lead and the female lead in thumping spike 2 had female lead at the same age or younger than the male lead

Both dramas are featured in a school-like plot. They both feature a sport despite the difference.