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Artist's commentary
COMIC1☆15 R12b 4.29 Indigo Hourglass
Onee-chan, it's bondage tiiiime~
toranoana: https://ec.toranoana.jp/tora_r/ec/item/040030724863
melonbooks: https://www.melonbooks.co.jp/detail/detail.php?product_id=501875&adult_view=1