Worked on expanding the parsing capabilities of KotatsuApp by developing and integrating a new manga source parser for ReadOnePiece within the kotatsu-parsers repository. Focused on backend development using Kotlin, the work involved implementing logic to fetch manga lists, detailed metadata, and page URLs from the ReadOnePiece source. The parser was seamlessly integrated with the existing manga loading system, enabling users to access additional content through a unified interface. Emphasized API integration and web scraping techniques to ensure reliable end-to-end data flow. The contribution addressed feature expansion, enhancing content coverage without introducing bug fixes during the development period.