This figure depicts Oyama Mahiro from Onii-chan wa Oshimai in her transformed form. The character is posed dynamically with one knee slightly bent and a hand raised as if casting a cheerful spell. The sculpt renders her facial features with a soft expression, clear eyes, and a small smile that hints at her resilient personality. The outfit blends a stylized school uniform with magical flourishes, featuring crisp folds, layered fabric, and carefully painted accents that catch the light. Details such as the hair, accessories, and footwear are sharply defined, showing fine linework and subtle shading. The base complements the character with thematic energy effects and rune-like motifs. The paintwork uses high-contrast shading and precise color separation to emphasize depth, texture, and the sense of movement in the scene.

Onii-chan wa Oshimai follows the story of a young man named Mahiro Oyama who is unexpectedly transformed into a girl by his eccentric sister using a magical spell. The narrative combines light hearted comedy with magical learning as Mahiro adapts to a new identity, navigates school life, and faces whimsical challenges from the world of spirits and spells. Throughout the series he experiences personal growth, learns to balance his responsibilities, and discovers that friendship and acceptance matter beyond gender. The plot emphasizes humor, gentle romance hints, and the evolving dynamic within the family as Mahiro gains confidence, adapts to new social situations, and proves that character and determination can shape a strange adventure into a meaningful journey.