Three and a half minutes, one entry on your list, and it sits in your head for a decade. This is n-buna before Yorushika, before suis, back when his instrument of choice was Hatsune Miku and a guitar tuned to sound like drowning politely. The arrangement is the whole argument: those bright, chiming arpeggios running underneath a vocal line that keeps climbing when it should be sinking, so the prettiness and the despair arrive at the exact same moment. Miku's tuning here is doing real work, breath and consonants pushed until she stops sounding like software and starts sounding like someone with something stuck in her throat. Vocaloid MVs get written off as filler entries by people who never actually pressed play on one, which is why this stays a word-of-mouth pick. Put it on with headphones, at night, and understand why the people who found it never shut up about it.

Umiyuri Kaiteitan is a single-episode music video made for the song of the same name by n-buna. Rather than a series or film with a story told over many episodes, it is a short animated piece built around one track, pairing the song with visuals.