勉強会 is a Weiß Schwarz card from リトルバスターズ! LB/W02-047. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
Choose 1 of your characters, during this turn, it gains the following ability.『【CONT】 Until you use this card's ability, the cost of stock to place in waiting room to use this card's abilities is -2.』
This card was printed in Japanese only; the English text above is an unofficial community translation.