It is a game that can be played with a game card (business card) and one coin. This is a simple game where you flip a coin with your finger and put it in a business card. It's a business card, so it's free. —description from the publisher (translated) ゲームカード(名刺)とコイン1枚でプレイできるゲームです。 コインを指ではじいて名刺に入れる簡単なゲームです。 名刺なので無料です。 —description from the publisher

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