Responses
In it's own way, it was kind of a misunderstanding, because Suruga still doesn't know that Hiroaka is the actual author of that book. Still, I do agree that it was refreshing, because it was an actual fight. Even if Suruga didn't realize it at the time, they were actually fighting about Hiroaka's inability to be honest about his feelings and not what the meaning of the book actually was.
Not every day you see an actual fight between the main couple in a yaoi. Its always just misunderstandings and people getting jealous and running away. Kinda refreshing and real that they had a fight about different opinions and on something other than just their relationship honestly.