It's various love stories between Chuuya and Dazai... All are separate medium-length novels.
Regardless of superiority or inferiority
The protagonists are Dazai and Chuuya, and the supporting characters are Fumino Toto
Power generation for love
It's basically the setting of the original work, so it won't deviate too much from the main show.
The age line and timeline are uncertain, there will be an if line
Concept: The spiritual unity of the two blacks