Appears on releases
| # | Title | Length | Track artist | Release title | Release artist | Release group type | Country/Date | Label | Catalog# |
|---|---|---|---|---|---|---|---|---|---|
| Official | |||||||||
| 1.4 | step up! | 3:31 | Rita | heart to heart ～from iyunaline to solfa2～ | solfa | Album + Compilation |
| Marble Sky Records | MSRC-042 |
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