for the postman to heaven ost aka farewell ah, there's a bittersweet story behind it. that song was basically hidden and unreleased, and suddenly in 2018 the director/producer of the movie (i dont quite rmb please cmiiw) posted the full song for fans he said we deserve to hear it full 😭 that day became a massive crying day for cassiopeia 😂 i cried a lot as well hahaha
Omg can’t wait for you to watch the Banjun Dramas! Esp the episode “Dangerous Love”. It’s iconic! Also the heaven’s postman OST is a rare one cuz the original OST only had Jaejoong’s solo version. The OT5 version was never released (except a few seconds snippets in credits when the movie was released). The ot5 version was only released like 2-3 years ago.
"Share the World" was the 11th opening to One Piece and their cover of "We Are" was the 10th opening. With anime series, they usually get multiple opening and ending songs and they always have full-length versions. But yeah, if you look at TVXQ's singles discography page on Wikipedia, you'll see the different songs they did for both Korean and Japanese soundtracks.