Many english bl novels focus on the emotional journey of the male - male relationships. They often explore themes like love, acceptance, and self - discovery. For example, in 'Aristotle and Dante Discover the Secrets of the Universe', the two main characters grow and learn about themselves as they fall in love.
One characteristic is the exploration of same - sex relationships. They often focus on the emotional and physical aspects of love between male characters.
They often feature strong character development. The protagonists usually have distinct personalities and grow throughout the story. For example, in the main 'Guardian' novel, the characters evolve from being strangers to having a deep, emotional connection.
I think 'Sasaki and Miyano' is also among the best. The story is set in a school environment. Miyano is a fudanshi (a boy who likes BL) and Sasaki is a popular boy in school. Their relationship starts from Sasaki's interest in Miyano and slowly blossoms into a deeper connection. It has a lot of cute and heart - warming moments, and the way their relationship progresses feels very genuine. It also touches on the insecurities and self - acceptance that the characters go through.