Shouldn't the title be (成年コミック) [アンソロジー] 敗北乙女エクスタシーSP12 ?
The previous 11 titles were all in the 'Anthology' format, eg:
https://sukebei.nyaa.si/view/2932919
https://sukebei.nyaa.si/view/2907657
https://sukebei.nyaa.si/view/2907656
https://sukebei.nyaa.si/view/2907655
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orientpear