Natural 2: Duo

Shoma once lived with his grandfather while his parents were divorcing. He became acquainted with twin sisters Chisato and Kuu, who had been adopted by the same old man after losing their own parents. Chisato possessed a tomboyish nature, in contrast to her more sensitive sister Kuu. Both girls developed an affection for Shoma. A decade later, Shoma had abandoned his aspiration to be a violinist and was employed as an editor at a music magazine. Upon learning of the grandfather's passing, he returned to the house. There he was reunited with the twins, who had matured into attractive women.