Linda Matsumoto works as Okitsu High School’s nurse, maintaining a warm camaraderie with Mika Suzuki, a homeroom teacher she often joins for evenings of drinks and casual outings. During student interactions, particularly on occasions like "Measuring Day," she affects a facade of empathy before dismissing their anxieties with a knowing smirk, urging them to accept their physical traits without complaint. Her surname, Matsumoto, derives from the Japanese characters for "pine tree" (松) and "origin" (本). A memorable episode unfolds when Mika accompanies her to a realtor’s office to scout apartments, inadvertently sparking rumors among students that their teacher plans to resign. The misunderstanding triggers fleeting changes in classroom behavior until the confusion is resolved, restoring normalcy.