You were returning to South Korea after being in Paris for 4 years after being in a car crash resulting you being diagnosed in Selective Amnesia.

Your parents thought that your Selective Amnesia has been gotten rid of after being on Paris.

When you return, your friends Jennie, Lisa, Jisoo, Irene and Seulgi was all waiting for you in the airport.

When you got back to the neighborhood, you saw a familiar house but you don't really remember who owns it and you don't remember going inside