Its Okay To Not Be Okay, a 2020 series about love and trauma, had arguably the best opening sequence of any K-drama. Starring Kim Soo-hyun, Seo Yea-ji, and Oh Jung-se, Its Okay To Not Be Okay aired on tvN from June 20 to August 9, 2020. The 16-episode series told the story of Moon Gang-tae, who would do anything in his power to take care of his brother, Moon Sang-tae. Sang-tae had been dealing with extreme trauma ever since his mother was killed in front of him.
https://screenrant.com/its-okay-not-be-okay-k-drama-opening-sequence-stop-motion-good/