I'm Your Treasure Box * You have found captain Marine in a treasure chest

I'm Your Treasure Box * You have found captain Marine is a solo musical track released in 2022 by the Japanese virtual YouTuber Houshou Marine. Produced as part of her original music discography, the song was conceptualized to encapsulate the adventurous, high-energy persona of her character, a pirate captain searching for treasures. The track leans heavily into a J-pop idol aesthetic with synthesized orchestral arrangements, reflecting the broader trend of VTuber-led music productions that aim to bridge the gap between character roleplay and professional pop performance.

The song was designed to be highly memorable and performance-oriented, featuring rhythmic call-and-response elements common in idol culture. It was composed by Camellia, a prominent producer known for his complex and energetic electronic arrangements, who collaborated with Marine to blend her character's lighthearted, playful tone with a sophisticated musical backing. Upon its release, the song received significant attention within the VTuber community and garnered a large following on platforms like YouTube and TikTok, becoming a signature piece for Marine's brand and an iconic example of the high-production music output emerging from the Hololive talent agency.