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Multiple insiders told Sports Seoul on April 30, "Seo Kang Jun has been cast in the role of Jun Su in 'Why Are Families Being Like This'. He is set to star alongside Hyungsik and Nam Ji Hyun and Yoo Dong Geun who will most likely star in the drama." If their casting is confirmed, Hyungsik and Nam Ji Hyun will be the leading couple in the drama.

According to Seo Kang Jun's agency Fantagio on the 30th, Seo Kang Jun received the casting offer for the male lead's friend Jun Su. The rep stated, "There is a high chance that Seo Kang Jun will star in 'Why Are Families Being Like This'. There are still scheduling issues to work out."

'Why Are Families Being Like This', written by 'Baker King Kim Tak Gu' and 'Book of the House of Gu's writer Kang Eun Kyung, portrays the dysfunctional families of this generation. The drama is set to air following 'Very Good Days' in August!