Hikaru no Go: Sabaki no Ikkyoku! Inishie no Hana yo Sake!!

A stray baseball leaves Hikaru responsible for Kaga's broken cup and sends him shopping for a replacement. At an antique shop, he encounters a dishonest dealer and a girl trying to recover a vase belonging to her family.

She reminds Sai, the spirit accompanying Hikaru, of someone from his distant past. Rather than let the dealer have his way, Hikaru and Sai bring the dispute to the go board, where a carefully played match can deliver its own kind of justice.