4th January 2014
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Chapter 69 is the first chapter in the tankobon, Natsume Yuujinchou 18, published on 4th January 2014.
Natsume and Aoi finally found Aoi's childhood friend, a 3rd year student at the same school with Natsume. Natsume disbelief someone at that age getting married, suspicious that Aoi had yet tricked him again.