First released: 29th December 2023
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- 1.Shunkan Heartbeat (Hiodoshi Ao SOLO ver.)3:34
- 2.Shunkan Heartbeat (Otonose Kanade SOLO ver.)3:34
- 3.Shunkan Heartbeat (Ichijou Ririka SOLO ver.)3:34
- 4.Shunkan Heartbeat (Juufuutei Raden SOLO ver.)3:34
- 5.Shunkan Heartbeat (Todoroki Hajime SOLO ver.)3:34