Tuklasin ang HULA HOOP / StarSeed ~カクセイ~ ni LOONA, inilabas noong 13/09/2021. Isang album na may 4 na kanta kabilang ang 'HULA HOOP', 'StarSeed 〜カクセイ〜', 'PTT（Paint The Town） - Japanese Ver.'. Kumuha ng detalyadong streaming stats, pagsusuri kada kanta, at mga sukatan ng pakikilahok ng tagapakinig.
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