This study aimed to investigate the process of constructing a "fast-protocol" for violin instruction. Since learning string instruments has not been common, and because there are limited hours for music in Japanese schools, the author, a violinist, collaborated with the general music teacher at a middle school in the Tokyo metropolitan area, and co-created the protocol which contains three lesson units as follows: (1) to play an open string on the violin; (2) to discriminate pitch by string crosses on the violin; (3) to discriminate pitch by using fingers on the violin. As for data collection, the study videotaped students' learning, and maintained log notes. This study also collected students' commentary focusing on perceived challenges after each class (N = 120). Based on all gathered data, after completing the coding process, researcher and teacher co-constructed the narrative. Findings include critical examinations of readiness in violin teaching and learning, and variations on violin-specific challenges associated with enjoyment and satisfaction for beginners.