Here is news regarding the official Japanese release of ONF's Open the Door.

Open the Door has been officially released in Japan.

There is a music video too, and unlike the Korean version, it has a bright vibe.

I suppose you could say it was after opening the door and stepping out.

So, at the release event, I dressed dandy like an office worker or a student.

In Part 2, everyone wore dark clothes.

It's the same melody, but the language and lyrics are different, so it feels new.