Appears on releases
| # | Title | Length | Track artist | Release title | Release artist | Release group type | Country/Date | Label | Catalog# |
|---|---|---|---|---|---|---|---|---|---|
| Official | |||||||||
| 1.8 | ある日の出来事 | 2:40 | HIKO | Cross Days Original Sound Track | HIKO | Album + Soundtrack |
| Lantis | LACA-5905 |
| Pseudo-Release | |||||||||
| 1.8 | An Incident One Day | 2:40 | HIKO | Cross Days Original Sound Track (English Translation) | HIKO | Album + Soundtrack | |||
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