Mushi Mezuru Himegimi no Kekkon: Koukyuu Hagure Hime no Kodoku to Nazotoki Konintan

Linglin is the 17th princess of Zhai, a powerful empire, and is known for her unusual fascination with insects and poisons. She is ordered by her sister, the empress, to marry Yang Huangya, the king of Kui. The people of Kui are initially pleased with the union, but their enthusiasm fades when they learn of Linglin's interest in creating poisons rather than engaging in traditional royal customs. As rumors of attempted assassinations against the king arise, Linglin becomes a suspect, and her situation becomes increasingly dangerous.