Hana Yori Dango Episode 21 -

If you are looking for the manga content, deals with the aftermath of Kaede Domyoji discovering Tsukushi living in her home.

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). Hana Yori Dango Episode 21

How to watch and stream Hana Yori Dango (Boys Over Flowers) - Roku If you are looking for the manga content,