A PC-88 visual novel.
Motoko Hime is science fiction writer. After finishing writing a novel she was sucked into the novel and you're the only one who can save her.
Near future. The unknown black shadow enemy is planning to conquer the Earth. Erika is a special agent on a mission to investigate enemy's new weapon Spectron. Protagonist is an information agent that gets into contact with Erika to receive information from her. Together they must infiltrate enemy base and destroy the secret weapon.
The owner of Kuronekoso “Oonogi Yoshizou” was killed. There are 8 suspects related to him. The player becomes a detective and searches with his partner.