Proposing marriage to the hitman sent to kill you seems like the worst survival strategy, unless your desperation knows no bounds. The animated adaptation of Firefly Wedding (Hotaru no Yomeiri) released a new promotional video confirming its anticipated premiere will arrive on screens next September 9, offering a glimpse into this peculiar period romance tinged with obsession and danger.

The video showcases the opening theme titled “Period,” performed by singer iri, who makes her debut in the animation industry with this track. The singer commented that she was deeply moved by the protagonist’s determination to stay strong amid overwhelming reality, while the manga’s author, Oreko Tachibana, affirmed that the song conveys unwavering willpower that brings the characters’ emotions to life. Meanwhile, the group TOOBOE will handle the ending theme with the song “Yumegokochi.”

For the main voice cast, actress Lynn will voice young Satoko Kirigaya, while Koki Uchiyama will portray the dangerous assassin Shinpei Goto. Joining them are Kent Ito as Kotaro Ogawa and Kenjiro Tsuda as Mitsueda. Animation production is by david production under the general direction of Takahiro Kamei, featuring Yukiko Aikei for character designs, Yuko Kakihara for script supervision and writing, and NOGRID for the soundtrack composition.

About Firefly Wedding

Written and illustrated by Oreko Tachibana, the original manga began serialization in Shogakukan’s Manga ONE app in January 2023. The story transports us to the Meiji era, introducing Satoko, a noblewoman who appears to have everything but suffers from a serious illness that gives her little time to live. When her plans for a beneficial marriage for her family are threatened by Shinpei, a mysterious hitman sent to kill her, the young woman makes a desperate decision to save herself: propose marriage to her own assailant. However, she didn’t expect this dangerous man to take the promise of “until death do us part” in the most literal and intense way possible.

What do you think of this story where survival turns into a rather dark romance?