Danbooru-based image board with a specialization in high-quality images.
disc_cover hayama_kou hayama_teru inadequate_print_resolution megane sansha_sanyou seifuku

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Concatenating the disc covers of these character songs (four in total?) can form a bigger image...
It does (not perfectly) but sadly I don't have the other two parts in good size. http://imgur.com/NnmUhY5
Just found a complete image in the form of tokuten: https://www.animate.co.jp/original/24695/

Since it reads "連動購入特典", one will have to buy all of those CDs to get this?