Any idea where I can purchase this doujin digitally?

Dunno if i'm being dumb or something, but no matter how hard I try I can't find Okina here, is that supposed to be Yukari?

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Xinser said:

Any idea where I can purchase this doujin digitally?

Well, i did found the doujin on twitter (here it is), but... now that there's two of it, wouldn't we include it in this? or it would have it's own pool, similar to Marshmallow Sumireko's case?