Title auto-translated
Also known as Cassmire: The Loyal Sword · 충직한 검이 되려 했는데 · Chungjikan Geomi Doeryeo Haenneunde · I Was Planning to Become a Loyal Sword · I Tried to Be a Loyal Sword · Loyal Sword · Aus Treue zu meiner Schwester · Kashmire, la virtuose de l'épée
Story by Seomda, Shion (시이온) · Art by ilye · Updates every Tuesday
Updated Jun 22, 2026
To pay for her ailing younger sister's medicine, she became a mercenary and never once let go of her sword. Then one day, a chance fall triggers memories of a past life — and she realizes she's actually inside a reverse-harem novel where her sister is the heroine. Worse, she herself is the daughter of Duke Crisis, a man notorious for his bloodthirsty cruelty. She had no intention of getting tangled up with him, but when her sister's condition takes a sudden turn for the worse, she has no choice but to seek out the duke's estate. What she finds there surprises her: the supposedly heartless Duke Crisis is acting strangely paternal, declaring that his daughter need never kneel before anyone — not even the emperor. And her angelic little sister Aria has inexplicably turned fierce and protective. As if that weren't enough, the men swarming around her sister in the original story start turning their attention toward her instead — including a crown prince willing to hand over his entire kingdom, a man who claims the night they spent together binds her to him, and a pope who privately worships her as his one true god. Has the whole world lost its mind?
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