Firefly Wedding — the anime adaptation of the popular romantic suspense manga — has set its Japan premiere and revealed a new teaser plus additional cast members, Animation Magazine reports.

The Story

The series follows a young woman whose arranged marriage proposal is interrupted by a firefly-lit encounter with a mysterious, scarred suitor who is far more dangerous than he appears. It's a slow-burn blend of period romance and thriller, beloved for its gorgeous art and its central relationship that walks a knife's edge between devotion and dread.

What the Teaser Shows

The new teaser leans heavily into the show's signature visual identity — fireflies, kimono, and candlelight — while teasing the darker plot threads to come. The cast reveals add several prominent voice actors, signaling the production is ramping up to a full broadcast slot.

When It Premieres

With the premiere window now confirmed for Japan, an international simulcast announcement is expected to follow shortly. Manga readers have been waiting for this adaptation for years — and the early footage suggests it was worth the wait.