Nachi Aono’s dark fantasy romance manga I Want to Love You Till Your Dying Day announced today the series will receive an anime adaptation, following the launch of the anime’s official website and X (formerly Twitter) account. Announcement art, a teaser visual, a first trailer, cast and crew announcements were all released as part of the announcement.
The cast featured in the manga’s first promotional video will be reprising their roles in the anime, as can be heard in the anime’s teaser trailer:
The cast members confirmed so far include:
Sheena Totsuki: Rie Takahashi (Megumin in KONOSUBA)
Mimi Kagari: Rina Hidaka (Milim in That Time I Got Reincarnated as a Slime)
Lizzy Seiran: Asami Seto (Mina Ashiro in Kaiju No. 8)
Ali Maud: Yui Ishikawa (Mikasa Ackerman in Attack on Titan)
A teaser visual has also been revealed:

Additionally, both original manga artist Nachi Aono and character designer Kyoko Yufu have shared new art in honor of the announcement:

Art by Nachi Aono

Art by Kyoko Yufu
Takudai Kakuchi (In the Heart of Kunoichi Tsubaki) directs I Want to Love You Till Your Dying Day at ROLL2, with character design by Kyoko Yufu (Delicious Party Precure) and series composition by Jukki Hanada (Love Live! School Idol Project). Yasushi Tomoda serves as assistant director. The series, based on the manga by Nachi Aono, will be produced by Infinite.
Nachi began serialization of the manga in 2018, with seven volumes released in Japan to date. Kodansha USA publishes an English translation of I Want to Love You Till Your Dying Day, and describes the first volume:
Death lurks behind a mysterious orphanage where children train to become magical weapons of war. Among them is Sheena, who longs to stop the fighting and end the conflict. On one gruesome night, Sheena meets a strange girl covered in blood, with a smile on her face. The mysterious girl turns out to be a secret weapon—an immortal child soldier named Mimi. When the two become roommates, there is growing tension and attraction. How will the peace-loving Sheena live with someone who welcomes death?
Source: Comic Natalie