The title you provided, "Doramaindoai," is almost certainly a phonetic spelling of . However, there is no major manga currently serialized with the exact title Diamond Eye: Ousama ni Sasagu Kusuriyubi .
However, the exact title as written seems to be a slight mix of romanizations. The likely correct title is:
Beyond unofficial "repack" sites like Doramaindo , the drama is officially available on streaming platforms like Rakuten Viki with subtitles in multiple languages. Reception