probably the longest running title in doujin history. and this is not even the latest. damn. hats off to kutani. to think it all started with anna liebert back in 2006... well, long may it continue. and thanks for sharing!
Actually, pretty sure his SAO Suguha series is one number longer. Also, funnily enough, Kawase Saeki also has had a Kirito x Suguha doujin series with way more entries.