Nissenjuyon

And here, it's not purely male vocals; there's also female vocals. This means it's not entirely within the scope of the contest, so minus one point.

The problem with such strict adherence to the rules is that some songs simply can't be categorized anywhere, regardless of their quality or the desire to share something. And here, if it's not male vocals, then what is it? It's clearly not female, not a duet, not a choir, not even a cappella... It only fits in the "free" category, which isn't available every year. But in my opinion, 95% similarity is acceptable; the female vocals are barely noticeable.