So I think I have an idea that makes sense of what happens at the end of this MV!!!
First, the “Nothing Without You” album is meant to be a prequel to the “To Be One” album, right? Therefore, what if the “Beautiful” MV is also a prequel to the “Energetic” MV?? YMC has already used the clear cassette tape with the flowers to symbolize this during both the album promotions and in both MVs (see pictures below), even though the flower placement is slightly different in each video (let’s just assume that the flowers can move around in there and it IS the exact same tape). The tape itself is also on the opposite side of the cassette to symbolize the change in time (cassette in “Energetic” MV is rewound to symbolize a new beginning). This would mean that the characters from the “Beautiful” MV and their relationships carry through into the “Energetic” MV.
The most important bit about this is that it means Ong Seongwoo is alive, and I’ll detail how I think that happens below the cut.