Via, the fourth Princess, was impatient as the royal palace was busy fighting for succession. That’s because the lewd emperor implied that he wanted her to be his concubine. Via lived unobtrusively in a sickly setup, but even as she stays still, things just get worse. Therefore, she decided to offer a time-limited concubine contract to the next emperor, the first Prince Alex. With her fragile beauty on the outside, but her strength and intelligence on the inside, Via charms everyone around her and wields the Prince of the great power. This is the story of the life of the unconventional Princess Via! 皇宮が後継者争いでにぎわう中、第四皇女のヴィアは焦っていた。それは、好色家の皇帝(義父)に妾妃になるよう仄めかされたから。今まで病弱設定で目立たないように生きてきたヴィアだったが、じっとしていても状況は悪化するだけ。そこで彼女は次期皇帝の筆頭、第一皇子アレクに期限つきの愛妾契約を持ちかけることにするが――!?