“Sunny Day Song” Honoka Kosaka is a Weiß Schwarz card from Love Live! DX Vol.2 LL/EN-W02-E063. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
【AUTO】 When this card is placed on the stage from your hand, reveal the top card of your deck. If that card is a 《Music》 character, you may deal one damage to your opponent. (This damage may be canceled. The revealed card is returned to its original place) 【AUTO】 When a card named "Sunny Day Song" is placed on your climax area, if this card is in your center stage, until end of turn, all of your characters get +500 power and the following ability. "【AUTO】 When this card's battle opponent becomes 【REVERSE】, you may choose a character in your waiting room, and return it to your hand."