You might be able to find it in specialized bookstores that carry BL literature. Some large chain bookstores also have a section for it. Online, platforms like Amazon or specialized manga and BL e - book stores could be good places to look.
I'm not entirely sure which specific 'full volume bl side story' you're referring to. 'BL' usually stands for 'Boys' Love'. It could be a side story within a Boys' Love-themed series in a full volume. Maybe it's about the secondary characters' love stories or some additional plotlines that didn't fit into the main story.
Chapter 253 was the last chapter of the fourth volume. There were a total of seven volumes of Qing Yu Nian's novels, which were in order: In Danzhou, In Jingdou, Snow in Cangshan, Fog in the North Sea, Jiangnan in Beijing, Joy in Front of the Palace, and Courting the Emperor.
Chapter 253 was the last chapter of the fourth volume. There were a total of seven volumes of Qing Yu Nian's novels, which were in order: In Danzhou, In Jingdou, Snow in Cangshan, Fog in the North Sea, Jiangnan in Beijing, Joy in Front of the Palace, and Courting the Emperor.
Chapter 253 was the last chapter of the fourth volume of Qing Yuannian's novel. There were a total of seven volumes of Qing Yu Nian's novels, which were in order: In Danzhou, In Jingdou, Snow in Cangshan, Fog in the North Sea, Jiangnan in Beijing, Joy in Front of the Palace, and Courting the Emperor.