Kokyu No Nisemono Reigu Hi Ha Kogu No Himitsu Wo Abaku (Alpha Police Bunko) [Light Novel]

[Machine Translation] The princess is feared by everyone in the palace, but she has a secret to protect. She is not really the princess, but her maid, Sun Lantern. The real queen had died a suspicious death two years earlier. Although she has doubts about her death, she has always prioritized the protection of her orphaned son, until one night she meets an exceptionally beautiful man. He is Qin Baitei, the imperial brother who was supposed to have died of illness...? When he tells her that he was almost poisoned and that the princess may have been poisoned as well, she decides to fight alongside him to uncover the truth...

「今日から貴方の剣になります」後宮の誰もに恐れられている貴妃には、守り抜くべき秘密があった。それは彼女が貴妃ではなく、その侍女・孫灯灯であるということ。本物の貴妃は、二年前に不審死を遂げていた。その死に疑問を持ちながらも、彼女の遺児を守ることを優先してきた灯灯は、ある晩絶世の美男に出会う。なんと彼は病死したはずの皇兄・秦白禎で...!?毒殺されかけたと言う彼に、貴妃も同じ毒を盛られた可能性を示され、灯灯は真実を明らかにするために彼と共に戦うことを決意し―