Publishing editor Hirai Momo and fashion designer Myoui Mina have been a couple for three years and their wedding day is fast approaching. But feeling that something is missing in their life, Mina suspects that Momo doesn't feel passionate towards her anymore and merely regards their relationship as a comfortable living arrangement. Several days before getting hitched, they fight, Mina cry in the park and there she meets and becomes attracted to Yoo Jeongyeon, a professional photographer.