TO Books has confirmed that the Koishita Hito wa, Imouto no Kawari ni Shindekure to Itta. – Imouto to Kekkon Shita Kataomoi Aite ga Naze Imasara Watashi no Moto ni? to Omottara (The Person I Loved Asked Me to Die in My Sister’s Stead/ 恋した人は、妹の代わりに死んでくれと言った。―妹と結婚した片思い相手がなぜ今さら私のもとに？と思ったら―) light novel series by Nagano Mizuki has been green-lit for an anime adaptation.
[https://x.com/TOBOOKS/status/2008735362542432500?s=20]
Author Nagano started the story in November 2020 on the Shousetsuka ni Narou website, and TO Books published the first novel in print in September 2021, with illustrations by Toyota Saori. The series’s eighth novel will be released on January 10th, 2026.
The novel series was adapted into a manga by Yamori Maki in June 2022 on TO Books’ Corona EX manga website, and TO Books published the manga’s first tankoubon volume in October 2022. The manga’s sixth volume will be released on January 10th, 2026.
Tokyopop publishes the manga adaptation in English under the name The Person I Loved Asked Me to Die in My Sister’s Stead, and it released the manga’s fourth volume in August 2025. Tokyopop describes the manga story below:
“Lady Wisteria’s greatest wish is to be worthy of the man she loves, Lord Bright. But when Wisteria’s little sister, Rosalie, is selected to enter the Predawn Realm as its guardian, never to return, Bright begs Wisteria to take Rosalie’s place! After all, Wisteria is skilled with magic, and resistant to the sinister miasma that threatens the mortal world. Heartbroken, Wisteria enters the Predawn Realm, accompanied by the sacred sword, Sartis. More than twenty years later, a stranger with a familiar face appears, demanding the sword and challenging Wisteria. Who is he, and why does he resemble Lord Bright…?”
