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cafe_sourire cuffs gayarou ogiwara_kyouko

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Does anyone have the copy of this calendar (http://www.cuffs.co.jp/main/store/201412w/ ) and can help lookup the artist names?

It's supposed to have one by suimya. I thought it's this one (because it's the only one left after tagging all the obvious ones) but now I am pretty sure it's by Gayarou. Maybe post #312225? (I knew that character is by pan in the game, but pan already did another one in Kantoku's game (post #312221) so it's not impossible.