The emotional depth is a key characteristic. In many good yaoi bl stories, the characters' feelings are not just surface - level. In 'No. 6', Shion and Nezumi's relationship is filled with a mix of emotions like fear, admiration, and love. And the setting can enhance the story. If it's a school setting like in some yaoi bl, it can bring in themes of youth and discovery.
Another characteristic is the use of visual elements. Since they are visual novels, the illustrations play a big role. The scenes are carefully designed to enhance the mood of the story. For example, a romantic moment might be depicted with soft colors and gentle lighting, while a tense or conflict - filled moment could have darker hues and more dramatic shading. This helps to draw the reader deeper into the world of the story and the relationships between the characters.
The safety of Yaoi manga varies. If it adheres to legal and ethical standards and doesn't promote negative values or behaviors, it can be considered relatively safe. However, some might have content that's not suitable for all ages or could have been produced illegally, which poses risks.
Sure, Yaoi manga is very real. It typically focuses on romantic and sexual relationships between male characters. These mangas are created and consumed by many people around the world.