back number official app.
back number official app.
In this app, you can enjoy various contents such as back number latest information, official fan club "one room" member exclusive movie and member blog.
About back number
What's New in the Latest Version 4.5.0
Last updated on Jun 26, 2026
一部の機能を修正しました。
Additional APP Information
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ျပည့္စံုလြန္း
Requires Android
Android 9.0+
Category
Content Rating
Everyone
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