Twiiter
Official Twitter : @BESTIEMofficial
関谷真由 : @Sekiya_Mayu0731
古橋舞悠 : @Fmayu_SHOCHIKU
instagram
Official Instagram : bestiem_official
古橋舞悠 : mayu_furuhashi_sck
YouTube
Brand New Music Channel
Twiiter
Official Twitter : @BESTIEMofficial
関谷真由 : @Sekiya_Mayu0731
古橋舞悠 : @Fmayu_SHOCHIKU
instagram
Official Instagram : bestiem_official
古橋舞悠 : mayu_furuhashi_sck
YouTube
Brand New Music Channel