Philippines: year 2300 Ang panahon kung saan ang Pilipinas ay nahahati sa tatlong paksyon na tila caste system na pamumuhay; una, ang mga bid (ang pinaka mababang uri ng pamumuhay o ang pinakamahirap). Pangalawa, ang mga commoner (middle class napamumuhay). At ang huli ang pinakamataas na antas ng pamumuhay, ang mga bidders. Kung bakit bidders? Sila ang may kakayahan para bumili ng mga bid o kahit na commoner para mailipat ang kanilang memory gene sa ibang katawan at masabing imortal sila. Ang memory gene na ito ay inimbento ng kompanyang MEMO© na hawak ng kasalukuyang diplomatic government. Isang eksperimontong pumasa sa Europe at patuloy na ginagamit ng mga bidders upang mabuhay sa kahit gaano pa kahabang siglo.

Have you ever heard about Himitsu Academy before? Of course you haven't heard it yet, unless you are one of the Mitsus and one of the inheritors of its secrets. In the academy that full of secrets and mystery. In the academy that normal people are not allowed. How can you escape your fate, if you are destined to be one of its inheritors? Most of all... Can you keep Himitsu Academy as a secret?

𝗘𝗿𝗶𝘁𝘆𝗶𝗮𝗻 𝗧𝗿𝗶𝗯𝗲𝘀 𝗦𝗲𝗿𝗶𝗲𝘀, 𝗕𝗼𝗼𝗸 ＃𝟭 || Infamous as a latecomer, Rainie found herself expelled from her current school due to her unpunctuality. Her seemingly ordinary life began to take a strange turn when she was forced to enroll in an unknown and suspicious institution located in the middle of a forest. She entered as a transferee in Tantei High, advertised to her as a school for extraordinary people. However, before she could even fully understand what was happening, ravels of mystery and conspiracy about her background and identity started lingering around Rainie. Would she be able to bear the truth once she learned that her whole life was built on a tragic lie?