Cluster

Three sisters live on a central planet referred to as "Heavenly," which is encircled by twelve other planets or "worlds." The eldest sister leaves for a training mission and does not return. The youngest, characterized by her energetic and peppy demeanor, sets out to find her. During her journey, she experiences disturbing dreams involving a dark, sinister man connected to her missing sister. She encounters a man with a troubled history who exhibits two distinct personalities—one kind and the other menacing and seductive. She later meets several other unusual individuals who join her on her travels. The narrative follows her journey and the adventures that unfold. The first volume includes this setup, and after the second volume, Tamayo Akiyama became the sole credited artist.