Just as AIKA's relationship with her husband begins to grow cold, she starts receiving tender affection from a neighboring ronin student. Initially, she sees him as nothing more than a kind and gentle younger man, but after a fateful incident, they become intimately involved. Their affair is discovered by her husband, triggering serious conflict. A dramatic story unfolds, weaving emotional instability with the progression of a new romance, portraying the inner turmoil of conflicting feelings and the struggle between desire and reality.