后宮のオメガ (Series) favorite_border

[DeepL Translation - needs review] Volume 1 Introduction: Ilya, the 13th prince of a small kingdom, was born as an Omega and has lived a life of resignation. On the day he enters the palace, he meets a mysterious boy. He is actually ......!　The gorgeous and beautiful Omegaverse of the palace, the upper and lower volumes are released at the same time!

(Translator: DeepL)