Any hololive original song (so not any covers) uploaded to any hololive vtuber's personal channel or on one of the Cover corporate channels in 2023 is eligible.

The song does not have to reach 20 million views in 2023, it just needs to have been released in 2023 and reach 20 million views fast enough to break the record.

The record to beat is currently held by Maribako (a.k.a. I’m Your Treasure Box ＊あなたは マリンせんちょうを たからばこからみつけた。 ) by Houshou Marine, composed by U.Z. Inu (Toby Fox) and arranged by Camellia, which took 178 days to reach 20 million views. Link: https://www.youtube.com/watch?v=vV-5W7SFHDc