System Service presents Oyama Mahiro from Onii-chan wa Oshimai! in a Zenryoku Zoukei figure. The 180 mm statue captures a high-energy moment, with Mahiro in a dynamic action pose that suggests motion and determination. The sculpt emphasizes clean lines and sharp contrasts: each strand of hair flows naturally, the outfit folds are crisp, and the character's expression radiates resolve and a hint of mischievous spirit. The figure rests on a solid base that supports a balanced stance, while subtle shading brings depth to the skin, clothing and accessories. The paint application highlights highlight areas and adds weathered texture to evoke a lively, anime-like presence essential to this line.

Oyama Mahiro is the central character in Onii-chan wa Oshimai!, a story about a boy who, after a magical transformation by his sister, becomes a girl and must navigate the world anew. Mahiro's journey blends humor, awkward moments, and growing self-awareness as he learns to cope with a different body, new social expectations, and friendships. The character remains stubbornly determined, quick-witted, and brave when facing magical mishaps or school-life challenges, often turning embarrassing situations into opportunities for growth and humor. Themes of identity, family bonds, and acceptance are explored with warmth and playful energy, which this figure aims to embody.