In a hidden school where young kunoichi train in the arts of stealth and combat, a strict rule forbids any contact with boys, viewing them as a dangerous distraction from their rigorous path. The series centers on Tsubaki, the academy's most talented and earnest student, who wholeheartedly embraces this code—until a chance encounter with a mysterious boy from a rival school plants a seed of curiosity in her heart. As Tsubaki grapples with these unfamiliar emotions, she must balance her duties as a top student with the growing conflict between her training and her feelings. The show blends lighthearted comedy with moments of genuine warmth, exploring the awkwardness of first love against a backdrop of ninja training and school life. Featuring a vibrant cast of classmates, each with their own distinct personality and quirks, the series delivers a charming slice-of-life story that questions whether the heart can truly follow orders.