The intensity of the emotions. In BL novels like this, the love is often expressed in a very raw and passionate way. The characters might be 'idiots' in the sense that they struggle with their feelings at first, which makes the story more relatable.
Well, I am addicted. The beautiful art, diverse plotlines, and the exploration of emotions in BL manga make it hard for me to resist. Also, it offers a unique perspective on relationships that I find fascinating.
There are several options. Some dedicated manga reading apps like Manga Rock or ComiXology could have what you're looking for. Also, some websites specifically focused on BL content might have a good selection.
I could be okay with BL sandwiches in manga if they are well-integrated and add something unique to the plot. But otherwise, I'd rather they weren't there.
The 'unintentional' aspect makes it special. In many love stories, the characters actively pursue love, but here it might be more of a gradual discovery of feelings that they didn't initially expect. This gives a more natural and unexpected feel to the relationship development.
There is 'No. 6' which has a post - apocalyptic setting and a complex relationship between the two main male characters. It's not just a simple love story but also has elements of mystery and adventure. Also, 'Super Lovers' is about the relationship between two brothers - like characters which develops into a romantic relationship in a rather unique way.