As the series progresses, Maron and Miyako fall in love with new classmate Chiaki, who wants to stop Maron collecting the chess pieces, for he knew that Finn Fish is the Da-Tenshi (Fallen Angel), but apparently in the form of normal angel.
The manga relates in detail Finn Fish's background, expounding on Finn's relationships with other angels and the events that led to her becoming Maron's partner.