|Fandisk||mentioned, not playable|
|All Star||not available|
|Units||with Hyuuga Ryuuya and Tsukimiya Ringo|
Though a full picture of Haruki has yet to be released, the composer can be seen to have messy blonde hair. His hair also appears to be styled the same way as Shinomiya Natsuki's from behind as according to the one CG from Ryuuya's route in Sweet Serenade.
- He shares the same name with one of the actual composers of the series.