On August 8 KST, the brand new TVING original drama series 'Erotic Love Story' (title subject to change) revealed its complete lead cast, including the female lead Go Ah Sung, male lead Jang Ryul, and more. 

'Erotic Love Story' follows an independent princess named Hwa Ri (Go Ah Sung), who leaves the palace and ventures out into the world outside in order to choose her own marriage suitor. She then meets a man named Choi Hwan (Jang Ryul), a top marriage suitor for the princess, but also a serious womanizer. 

The leading cast also includes SF9's Chani, playing the role of a elite Sungkyunkwan scholar named Jang Won. His intelligent and beautiful younger sister, Ji Won, will be played by KARA's Seungyeon. 

The news of Seungyeon's casting as Chani's younger sister came across as a great shock to many drama-loving K-netizens. The shock comes from the 12-year age difference between the 2nd-generation K-Pop idol Seungyeon (born 1988) and the 3rd-generation K-Pop idol Chani (born 2000).

Onlookers commented,

"I don't know about this... Chani always looks so young in dramas."

"No matter how young Seungyeon looks for her age, I don't think this will work lol."

"This would be a stretch even with a male actor who looks much older than his real age... but Chani? He still pulls off high school roles without a problem."

"Shouldn't Seungyeon be his older sister??"

"Even if Seungyeon still has a baby face kekekekeke. Everyone knows it's her and she's been active for so long that no one will be convinced kekekekeke."

"Is this a spoiler?? Did he die at a young age and he only appears in the story during flashbacks kekekekeke."

"This doesn't make sense kekekeke. There must be some kind of twist to the story."

"I can't believe Seungyeon is in her thirties. She still looks like someone in her early twenties..."

"I remember Seungyeon looked much older when she filmed a drama with Rowoon too. Chani looks a lot younger than Rowoon so..."

Also starring Son Woo Hyun, Lim Hwa Young, Do Yeon Jin, Kim Taek, and more, 'Erotic Love Story' is scheduled to premiere some time in 2024.