Can you guess the Red Velvet Song by the Chord Progression?

Can you guess the Red Velvet song, but only by the chord progression / the harmony? Find out in this quiz-type video that aims at Reveluvs with extensive ear training and too much time at their hands. Experiments have shown that this can be quite difficult, so there will also be an "easy" version with more melody, rhythm, bass line... Also, I included some sheet music to at least somewhat close the otherwise huge gap between us average monkeys and the fabulous perfect pitch gang. Let me know if this was too easy, too hard, or just right. What initially started as a dumb idea actually ended up giving me an interesting insight into Red Velvet's songs and their "harmonic distribution". First off, there are quite a lot of Red Velvet songs with rather unique chord progressions. Secondly, even when the chords themselves are rather simple, some rhythmic tricks can make for a very unique experience. Some artists have sold countless records on the same four chords, and I am thankful for Red Velvet and their songwriters to venture beyond that. This video only contains 20 songs. Given the right time and motivation, I might make another 1-2 videos for Red Velvet songs. And other K-pop artists are always a possibility too. Maybe I will make a version just for Andreas Öberg prechoruses. ;)