Pythagoras Trio (IDOLiSH7) by Fukagawa Kasumi #3193887
Mangaka: Fukagawa Kasumi, Uploaded by Hakaru Jan 20, 2021,
Fukagawa Kasumi, TROYCA, IDOLiSH7: Second Beat!, IDOLiSH7, Pythagoras Trio, Nikaidou Yamato, Rokuya Nagi, Izumi Mitsuki, Waving, DVD (Source), Official Art, Twitter