In a life unfulfilled, Robin struggles to do much of anything. Caught between their own desires to ignore others and get what they want, and wanting to genuinely help people to the point that it would cause their own death; Robin lets themself only react until one day a fire broke out at an elementary school. Robin's kind heart won out and they rushed to save others, to their own death.

Having led a pitiful life always at odds with oneself that it killed Robin; they tore their soul into two halves as they were being fed into the cycle of reincarnation. Split and born into a twin brother and sister, Rosario and Alice, the two share their dreams, partial memories of a past life and use them as inspiration to follow their passions together, until the end of their lives.