Slow Step follows Minatsu Nakazato, a high‑school softball player, as she becomes entangled in a romantic triangle with her classmate Shu Akiba and the rising boxer Naoto Kadomatsu. The relationship is more complex, resembling a “three‑and‑a‑half” dynamic: while Naoto harbors feelings for Maria, it turns out he is actually in love with Minatsu, who once assumed a disguise to evade dangerous people.