It has been revealed that Singer Solbi participated in a sex education video for prevention of sexual harrassment.

On the July 17th broadcast of SBS "Strong Heart," guests such as Lee Chung Ah, Nam Kyung Joo, Jun Su Kyung, Solbi, Park Ki Young, Super Junior Kyuhyun, Shindong, Leeteuk, Eunhyuk, After School Lizzy, Jungah and f(x) Victoria starred on the show for their Olympics special.

On the episode, Solbi revealed that she acted in a sex education video titled 'An Unforgivable Sin' and said  "They still show that video in elementary schools."

Surprisingly, clips of the actual video were shown. The clips showed images of a much younger Solbi, gaining public interest.

Solbi explained, "I was cast on the street for a role in a movie, and that movie turned out to be a sexual harassment prevention drama. The rate of sexual harassment decreased because of me." Then she asked "Please upgrade the drama. I'll film it again, so please change it."