The story is about two brothers, one of whom is autistic.

Both dramas are set in a high school. The roof of the school plays a fundamental role. So many mysteries to understand.

Both dramas are set in a high school and behind the death of a student there are many mysteries to solve.

The two dramas have many points in common: both are about the relationship between a male student and a female teacher. Their story is troubled due to social pressure.

The two dramas have many points in common such as the initial incipit, some parts of the plot, the characters. Both are about the relationship between a male student and a female teacher.

In both dramas the protagonists are elderly people who begin to have memory problems.

Both feature actor Wang Yibo as the male protagonist and both are about dancing.

The stories are similar and the characters are similar too. In OUT we don't have time travel, but in both they talk about gangs.

With the same actor. In both dramas, the focus of the plot takes place in one room.

In both the film and the Korean drama, the two male protagonists manage to go back in time, the first by blowing out birthday candles, the second by burning incense.

In both the film and the Korean drama, the two male protagonists relive the same day in hopes of being able to save their sweetheart.

In both films, the protagonist can see a ghost-boy and helps him solve a case
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