Nothing Serious is a 2021 South Korean romantic film, written and directed by Jeong Ga-young for CJ ENM. Starring Jeon Jong-seo and Son Suk-ku, the film revolves around 32 years old Woo-ri and 28 years old Ja-young, who hate being alone but have anxieties when it comes to dating. They meet with each other through a dating app.

Jeon Jong-seo, also known as Rachel Jun, is a South Korean actress. She made her acting debut in a leading role in the 2018 acclaimed thriller film Burning. She next starred in the film The Call (2020) for which she won the Baeksang Arts Award for Best Actress – Film. She starred in the English language film Mona Lisa and the Blood Moon in 2021 and in the Netflix series Money Heist: Korea – Joint Economic Area in 2022.