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Artist's commentary
Doujinshi [Ganbare Doujin-chan 7] will go on sale around August 13th! From the continuation of the cherry-blossom viewing tour, the content will include episodes such as a sleepover business trip with a junior, a summer festival date (?), and a beach swimsuit episode. It's packed with content. Best regards!
Toranoana
https://ecs.toranoana.jp/tora/ec/item/040030994717/
Melon Books
https://www.melonbooks.co.jp/detail/detail.php?product_id=1532502