EXchange4, Pt. 1 (Original Soundtrack)
| Group | 보이넥스트도어 |
|---|---|
| Release | 2025-10-01 |
| Type | ost |
| Title Track | - |
EXchange4, Pt. 1 (Original Soundtrack) is a OST release by the K-pop group BoyNextDoor, released on October 1, 2025. BoyNextDoor debuted on May 30, 2023 under KOZ Entertainment.