Kokuryuu Heika no Seiryaku Hanayome Majo desu ga, Tasuketa Ryuu ni Yomeiri Saserare Sou desu

Olivia is a gifted witch who channels her magical abilities through song. However, her life changed drastically after she lost her voice while rescuing an injured black dragon during her childhood. Stripped of her ability to practice magic, she has since lived quietly alongside her older witch sister. Eventually, the sisters journey to the Dragon Kingdom to pay their respects and express gratitude to the Dragon King, Liberto, for a past intervention. Upon their arrival, they step into a politically charged atmosphere: the Dragon King himself has no desire to marry, yet his aides are fiercely scheming behind the scenes to secure a powerful witch as his royal bride. Despite his professed indifference toward women, Liberto unexpectedly begins seeking out Olivia, visiting her directly. This sparks an emotional and heartwarming romantic fantasy weaving together the fates of a voiceless witch and the realm's most formidable Black Dragon.