Amid a growing scandal involving Japanese actress Mei Nagano (25) and married actor Kei Tanaka (40), Korean actor Kim Mu Jun has been swept into the controversy, prompting a swift denial from his agency.

Speculation arose after Japanese media alleged that Mei Nagano was romantically involved with Kim Mu Jun, who is currently active in Japan. In response, Kim Mu Jun’s agency, Nine Ato Entertainment, told Hankyung.com on April 23, “Kim Mu Jun and Mei Nagano are just close colleagues,” firmly denying any romantic involvement.

The controversy erupted after Japanese weekly magazine Shūkan Bunshun published photos allegedly showing Mei Nagano and Kei Tanaka engaging in intimate behavior, claiming the two are having an extramarital affair. Kei Tanaka, who has been married since 2011 and has two daughters, is facing heavy criticism in Japan over the allegations.

Adding fuel to the fire, Shūkan Bunshun also reported that a Korean actor currently starring alongside Nagano in the TBS Sunday drama 'Castor' had been seen visiting her home. The drama, which premiered on April 13, features both Mei Nagano and Kim Mu Jun, leading to online speculation in both South Korea and Japan that Kim could be the rumored boyfriend.

Mei Nagano is regarded as one of Japan’s next-generation actresses, known for both her acting skills and striking visuals. Born in 1999, she made her debut in the 2009 film 'Hard Revenge, Milly: Bloody Battle,' and has since starred in numerous popular titles such as 'Daytime Shooting Star,'' My Love Story!!,' 'Half Blue,' and 'Love That Makes You Cry.'

Kei Tanaka, born in 1984, rose to prominence through his performance in the hit BL drama series 'Ossan’s Love,' which earned him significant popularity in Japan.

As rumors continue to swirl, Kim Mu Jun’s agency has taken a firm stance to protect the actor’s reputation, emphasizing his purely professional relationship with Nagano.

SEE ALSO: Kang Ji Yong, Kwon Eun Bi's cousin and recent 'Divorce Camp' cast member, dies at 36