Flowers in Greenhouse

A brother and sister, who used to be VVIPs at a hotel, end up on the streets after their family collapses overnight. They hear rumors about a castle in the forest that is said to be full of treasures, and decide to make their way there. They manage to find a way into the castle through a secret tunnel, where a beautiful, mysterious prince who loves men lives. Suddenly, there's a bleak atmosphere... The exit to the castle has disappeared?! A story of finding independence and love for those who have lived like 'flowers in a greenhouse'! ​ (Source: Naver, translated and edited)