胸に秘めた誓い 星乃一歌 is a Weiß Schwarz card from プロジェクトセカイ カラフルステージ！ feat. 初音ミク Vol.3 PJS/S125-088. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
【CONT】 For each of your other 《Music》 characters, this gets +500 power. 【AUTO】 When this is placed on stage from hand, you may Heal 1. 【AUTO】 {CX Combo} [(1) Discard 2 cards] When this attacks, if you have the Pants CX (113) in your CX Area, and your characters on stage have 4 or more colors, deal 1 damage to your opponent, then you may pay cost. If you do, deal 2 damage to your opponent.
This card was printed in Japanese only; the English text above is an unofficial community translation.