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Since childhood, Yeonha has fervently pursued his dream woman, Soo-yi, undeterred by her repeated rejections due to their age difference. For Yeonha, Soo-yi has always been his one and only. However, a harsh reality check arrives when he learns of Soo-yi's marriage while serving in the military. Years later, following Soo-yi’s divorce, Yeonha's unwavering love for her remains unchanged and he sets out to make his beloved noona aware of how deep his feelings truly are. As time passes, Soo-yi finds herself slowly but surely consumed by the fiery passion of Yeonha's love.
Garam hides a dark sexual secret she doesn’t want anyone to find out: her body only reacts when she’s being dominated. But one day, this secret is discovered by her younger brother’s friend, Ha-seong. 'Want me to help you? Then open your mouth.' Thus begins Garam’s sexual relationship with Ha-seong. But things get complicated when Ha-seong's younger brother, Woo-jae, also wants to join them. Surrounded by younger men, Garam finds herself caught in a forbidden love triangle.