Yokohama Ryusei was part of an idol group unit called “RED” for the smartphone series Colorful STARS way back in 2014. I think this song and music video is “Tenkai Navy Blue”.
In fairness, the song is good and Ryusei is adorable here 💜 Sorry for the crappy audio lol this is the only thing available
#YokohamaRyusei #横浜流星 #キャラフルSTARS #jpop
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