"I am still thinking about my future," Seol told the official website of the Asian Cup. "I definitely want to play more games next season.
"If I am not in the team next season, I will definitely have to find out whether another team wants a player like me."
Seol, who made just 27 appearances for Reading last season, has told Coppell of his desire to play more regular first team football and is hoping his enthusiasm will pay off.
He added: "I have spoken with the manager and he knows how I am feeling. He said he doesn't like players who are happy to be out of the team.
"I don't know what will happen, but as a professional player I will keep doing my best and see what happens."