Chiruno no Paafekuto Sansuu Kyoushitsu Kyuu-shuunen Baajon (PV) (Cirno's Perfect Math Class ⑨th Anniversary Version)

Project Heartbeat did not start retaining outdated personal bests until December 21, 2023. The upload date of this song was on September 9, 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.