共に過ごした夏 is a Weiß Schwarz card from 神様になった日 DBG/W87-099. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
【CONT】 All of your characters get +1000 power and +1 soul. ([[gate.gif]]: When this card triggers, you may choose 1 climax in your waiting room, and return it to your hand)