Appearance in "LadySteady Premium 1st Anniversary SP" has been confirmed!

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Returning to "THE FIRST TAKE"! Phantom Siita 's masterpiece "Zoku Zoku" will premiere on YouTube today at 10:00 PM!

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The new song "Rose-Colored Moon" will be released on Friday, January 30th! It's a song that depicts a strong and beautiful determination!

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Notification of shipping of annual course renewal benefits (for those who completed their procedures by December 2025 and whose subscription expires in December 2026)

Fan Club News

Notification of enrollment benefits shipping (for those who enroll in the annual plan in December 2025)

Fan Club News

AVAM x Phantom Siita two-man live show "I just want to be x addicted x with you ♡" to be held!

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放送室「シータの怪電波 #24」を公開！メンバーの描いた「かるた」を抽選でプレゼント！

Fan Club News

ファントムシータ Zepp Tour 2026「ふぁんとむ♥らんど」のファントムシータオフィシャルFC会員二次先行、オフィシャルHP・SNS二次先行受付のお知らせ

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First appearance on "THE FIRST TAKE"! A special medley will be performed in the new performance session "V/S THE FIRST TAKE"!

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First appearance on "THE FIRST TAKE"! A new project featuring Ado, the performance session "V/S THE FIRST TAKE" will premiere on YouTube today at 10:00 PM!

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