TAIPEI - Aaron Yan, a member of hit Taiwan boyband Fahrenheit, is now in the hot seat after a man went public with details of their alleged relationship.
The man, known as Mr A, claimed that the celebrity had cheated on him, dating two other men at the same time.
Yan, 32, has since issued an apology to his fans over the issue, though he did not explicitly refer to Mr A.
According to Mr A, Yan, now an actor, contacted him after Mr A had posted online about his break-up with another person.
Initially, Mr A said he was taken by Yan's sincerity, making trips to see him from wherever he was in Taiwan.
Entertainment portal Shanghaiist cited Mr A as saying that Yan did not shy away from introducing him to his celebrity pals.
Yan also splurged on gifts, air tickets for trips overseas and rental expenses.
But when Yan began to keep his distance after two years, a spurned Mr A started to investigate, contacting the media over what he had dug up about Yan's alleged relationships with the two other men.
He provided proof, from records of his own chats with Yan to photographs of the actor kissing him and other men.
Yan, in his apology, said: "I am very sorry for not handling my private affairs well.
"I once gave my true feelings to someone, but when it ended, I didn't handle it well, causing the situation to turn into what it has become today; this I didn't expect.
"I apologise to those I have caused pain. I will learn from this and become a better person."
His manager is also disputing Mr A's story, saying that all the photos showed Yan with only the same one man, instead of three as alleged.
Fahrenheit, which was formed in 2005, is in hiatus after its members pursued solo projects from 2012.