Futari o Musubu Ao

Hina, a girl prone to negative thinking, crosses paths with Nami, a girl who radiates an air of mystery. The key to the destiny awaiting these two girls lies within a certain blue telephone. Will she be able to defy fate and seize her own happiness? Or will she drown in the depths of Nami's love? This is the story of two girls, woven together by a blue thread.