Yanqing Nan Zhu Zhi Buliao

As the male protagonist of a shoujo manga, Bai Yuguang could be called a winner due to his wealth and good looks. Until one day, due to the low popularity of the manga, the author changed it from a shoujo to a BL! When Bai Yuguang woke up, he discovered that both the popular girl he secretly loved and the scheming girl who was his childhood sweetheart had both become cute boys! This is the tragic story of a shoujo male protagonist struggling to stay straight in a BL world, all because of a crappy author.

(Source: Tencent, translated)