Gundam Build Fighter OP Single - Nibun no Ichi Anime OST 7y ago BaKaRadio - Comment Gundam Build Fighter OP Single – Nibun no Ichi BACK-ON – Nibun no Ichi (Download) Gundam Build Fighter OP Single – Nibun no Ichi (MP3/320K) Release (2014.08.13) Artist BACK-ON Songs 2 Tracklist 01 ニブンノイチ 02 INFINITY If you liked this articleplease click on the "Like!".ShareTweetFollow on Twetter ! Follow BaKaRadioNet