Kokoro o Hiraku Utaikata

An alliance is forged between the human kingdom of Eroolia and Laarz, the country of the luccretias. In exchange for Luccretias' cooperation, Eroolia vows to find a cure for the 'Inadaptability Disease' affecting the luccretias. Princess Myana, the protagonist of KOKOUTA, travels to the human realm to monitor both the pact's progress and how her people are treated. What starts as a brief diplomatic trip turns perilous as Myana is caught in the crossfire between luccretias and humans. Her encounter with Ludovic, the Imperial Guard chief, forces her to question her faith in their alliance.