転入生 is a Weiß Schwarz card from D.C. D.C.II DC/W01-047. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
Look at the top card of your Stock. If that card is a Character with Level 1 or lower, you may place it into any slot on Stage.
This card was printed in Japanese only; the English text above is an unofficial community translation.