It is an idol group "mystear" with the concept of "Tomorrow I haven't seen yet" that combines Mystic, which means "mysterious", and Tear, which means "tears".
プロフィールやSNS
Mystear Official Web site
https://mystear.macham.co.jp/
Mystear Official Twitter
https://twitter.com/mystear_info
宮崎 あみさ(amisa miyaszaki/Blue)青
Twitter https://twitter.com/amisa_mystear
Instagram https://www.instagram.com/miyazaki_aa/
星川 汐音(sione hosikawa・White)白
Twitter https://twitter.com/shione_mystear
Instagram https://www.instagram.com/hoshikawa_s...
深月 萌愛(Moa Miduki)
Twitter https://twitter.com/moa_mystear
Instagram https://www.instagram.com/moa_13x/
SHOWROOM(もあきゅんのもあもあきゅんきゅんるーむ)
https://www.showroom-live.com/moa_13x
花森 ゆあ(Yua Hanamori)
Twitter https://twitter.com/yua_mystear
Instagram https://www.instagram.com/yua__mori/