As a seasoned animator with a love for storytelling, I'd be thrilled to bring your script to life in the vibrant world of Japanese anime. I've been fortunate enough to work on numerous animation projects like this, resulting in my proficient skills in 2D Animation, After Effects, and Video Services. Thanks for sharing the YouTube link, it helped me understand your desired aesthetic even better.
Moreover, my ability to adapt my art style to suit various projects is something I believe we can put to excellent use here. Even though you've mentioned having almost-ready character designs and environment layouts, feel free to lean on my creativity and expertise where needed. My deep understanding of animation production ensures I will deliver not just an exceptional 5-minute animation but also the necessary source files.
In addition to technical competence, I genuinely understand the importance of creative freedom within budget constraints. That said, I'm comfortable working within your $500 limit to provide an exciting anime experience that aligns perfectly with your vision. Rest assured that upon completion, all rights to the designs and film will belong solely to you. Let's collaborate and give your script a remarkable visual tale!