ふたりだけのひみつ is a Weiß Schwarz card from D.C.～ダ・カーポ～ 10thアニバーサリーミックス DC/W23-023. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
Place this card into Memory. 【CONT】 RECOLLECTION If this card is in the Memory, all your cards with 「音姫」 in its name get +500 Power.
This card was printed in Japanese only; the English text above is an unofficial community translation.