Quick answer — Mameshiba no Taigun performed 1 anime theme, including "Hadaka no Mermaid" from Grand Blue Dreaming Season 3.
Mameshiba no Taigun performed the anime theme songs "Hadaka no Mermaid" (Grand Blue Dreaming Season 3).
Mameshiba no Taigun's first listed anime theme is "Hadaka no Mermaid", the ending of Grand Blue Dreaming Season 3.