Hikaru no Go Vol. 5 (manga)

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Sai's games on the Internet have Go players around the world guessing his true identify. Among them is Hikaru's rival, Akira, who suspects that Hikaru is hiding behind the screen name "sai." So intense is Akira's interest, in fact, that he skips the first day of his pro exam for a re-match. And on a rainy Sunday, the battle of wills begins anew....