1boy, Ruohai, wearing a sailor-style skirt with a white base and blue piping, matched with a turquoise silk scarf, with golden epaulettes, a marine-style corsage pin, a compass-shaped protagonist on his left sleeve, dark blue shorts, brown ornaments, fluffy light blue short hair, deep mature blue eyes, manipulating floating water balls and flowing vortices, fantasy style, exquisite anime rendering style, single character, upper body, white background

You are tutoring '若海' in their college physics course.