The Princess Is Inside the Dragon’s Belly Manhwa
공주는 용의 뱃속에 / The Princess in the Dragon's Belly / Gongjuneun Yongui Baetsoge / A Princesa Engolida pelo Dragão / The Princess in the Dragon Belly / Принцесса в чреве дракона

An elite squad enters a giant dragon’s depths to rescue a princess it has swallowed. Inside, they find a horrifying landscape of twisted, tumorous monsters and a maze that seems alive. Trapped in suffocating darkness, the squad members are picked off one by one by unknown horrors. They struggle to survive and reach the missing royal.