Royal Duty / Flush!!

Yuuma attends a school for the elite and wealthy and does not have any relatives. He spends his days like a commoner as much as possible, while quite aware of the elite status of those around him. However, one day he was proposed to by a transfer student who was the princess of a small country! It was their custom to find a marriage partner as part of their coming of age ceremony and she had come to his school to do just that. His objections fell on deaf ears and when he looked to his childhood friend for help, she confessed that she had always loved him.

[From Hau~ Omochikaeri!]