Because Hana Yori Dango (Boys Over Flowers) has several famous adaptations, Episode 21 refers to different pivotal moments depending on the version you are watching.

While on a trip, news breaks that Shizuka (Rui’s first love) is being courted by a French politician and may marry him. Rui is devastated and tells Tsukushi that "it's over". In a moment of vulnerability on the beach, Rui kisses Tsukushi, which is witnessed by Tsukasa (Domyoji).

This episode focuses significantly on So Yi Jung and Ga Eul. Yi Jung tracks down his first love, Eun Jae, only to see her happily with his brother, leading to a heartbreaking realization for him. Where to Watch: You can find the full series on Netflix . Anime Series (1996–1997)

If you mean the individual chapter, it features Tsukasa and Tsukushi getting stuck in an elevator, forcing them to spend uncomfortable alone time together.

In this version, Episode 21 is a heavy-hitter for the "soulmate" storylines and the lead-up to the finale.