One great 'bungou stray dogs dazai x chuuya fanfiction' is 'Redemption in the Rift'. It beautifully explores the complex relationship between Dazai and Chuuya. The author does an amazing job of portraying their characters' inner thoughts and the push - pull dynamic they have. Another good one is 'The Bond Beyond Ability'. It shows how their relationship can develop in unexpected ways outside of the main story's battles and politics.
AO3 is probably the best place. It has a great tagging system, so you can easily search for Dazai x Chuuya fanfictions. There are also some Tumblr blogs dedicated to sharing fanfictions in this fandom. You might need to do some digging, but you can find some real gems there as well. Some Discord servers related to the 'Bungou Stray Dogs' fandom also share fan - created works including these types of fanfictions.
Well, you could say there are hints of love here and there. But it's not a conventional love story. The series is primarily known for its action and supernatural elements with love being a secondary aspect.
Bungo Stray Dogs is both. It began as a light novel and then was transformed into a manga. The light novel provides detailed storytelling, while the manga brings the characters and scenes to life visually.