Visions of Coleus

Coleus' Dream (コリウスの夢) is an original short story written by Fuse that was included in the Season 2 Blu-rays. The story was broken into four parts — one for each blu-ray — and served as the basis for the plot of the Movie Scarlet Bond. An OVA anime adaptation for the story was announced on February 19th 2023 and is planned to be released in Fall 2023.

Synopsis
The short story follows Rimuru as he performs a special mission given to him by Yuuki Kagurazaka. The King of the Kingdom of Coleus has reached old age and the battle for the succession of the throne among the royal family has begun. The main contenders are First Prince Sauzer who is backed by the nobility and Second Prince Aslan who is backed by the local branch of the Free Guild which has gone rogue and declared their allegiance to him. It's up to Rimuru to infiltrate the Kingdom of Coleus undercover as the Great Phantom Thief Satoru (大怪盗サトル) and deal with the situation, while also uncovering a secret plot brewing in the shadows.

Anime Adaptation
On February 19th 2023 it was announced that Coleus' Dream would be adapted into a three part OVA slated to be released in Fall 2023. The OVA features an opening performance by who created and sung many previous songs in the series as well as provided the voice for Satoru Mikami.