Reunited at a high school reunion after seven years, Manami and Ai meet again. Since their student days, Ai has harbored deep feelings for Manami, but Manami was completely unaware. Seizing the opportunity, Ai invites her over to her place, and their relationship gradually deepens. Burdened by family troubles due to her husband's job loss, Manami finds her heart stirred by Ai's tenderness and care, eventually giving in physically. Once she experiences the pleasure with Ai, Manami can no longer resist. Due to her difficult home situation, she decides to move in with Ai. Just as they settle into a secret, intimate life together, their bond takes an unexpected turn.