Pure Love Isn't A Straight Road

Natsumi, a school teacher troubled by her alcoholic husband, barely gets by holding onto the memory of a faint past romance with her student, Osawa. One day, she runs into Osawa, now a working adult, by chance. Sensing Natsumi's situation, he tells her 'You can always rely on me,' shaking her heart. Even though they are no longer teacher and student, it's still infidelity. Yet the two can't stop themselves...!