Both dramas have students struggling to succeed in high schools
Both dramas are quite emotional and has the youth struggles aspect
Both drams have good friendships between neighbors and students

Both dramas about students who are friends and trying to succeed in school also
have their own struggles at home
both dramas are emotional and educative about school life in china

Family and school drama
mostly about family and struggling youth in their lives
both are similar in the family aspect

Both Brotherhood dramas
Both are about two male leads chasing an unidentified creature or entity
Both are very intriguing and interesting plot with little to no romance

Both friendship dramas
Both youth dramas
Both have male friendship bromance drama
Both are short dramas

both are time travel dramas
the only common thing about the two dramas is time travel
nothing more

The two dramas are about time travel
the two dramas involve the complicated family relationship
and love story

The two dramas have the retro theme of Korea in the eighties
the two dramas talks about youth and love relationships

Basically the two dramas involves the same tunnel that takes people to another time line
the two dramas have a criminal case needed to be investigated through time

The two dramas have the same main lead Bai yu
Both dramas are family dramas and both dramas are real life like story ,, it's more real than any reality show
Both dramas are set in the past then go forward to present

Both are Ming dynasty dramas
Both are detective dramas
Both are Bromance dramas
and both are quite good brotherhood dramas

Both dramas are historical detective dramas
Both dramas are friendship brotherhood plot dramas
Both dramas are investigative dramas