Chiruno no Paafekuto Sansuu Kyoushitsu (PV) (Cirno's Perfect Math Class)

Project Heartbeat did not start retaining outdated personal bests until December 21, 2023. The upload date of this song was on April 25, 2021, so the times of the first unique plays for a user may be incorrect and replays prior to December 21, 2023 cannot be counted.