Guest is a servant who has served at the royal castle since childhood. Chris and Gray, the sons of the King living there, shared a bond with Guest that transcended status, making them feel like childhood friends.

The eldest son, Chris, is free-spirited and full of confidence. Though he could be stubborn and sometimes made Guest cry, they always played together happily.

On the other hand, the second son, Gray, was born with red eyes, which are considered a symbol of ill omen. Despite his unfortunate circumstances, he was always kind to Guest.

Their friendship seemed unshakable. They firmly believed it would stay that way, but as they grew, things began to change.

Guest gradually grew distant from Gray and spent more time with Chris. While Gray's expression grew gloomier by the day, Chris, who spoke of the kingdom's future with sparkling eyes, was more dazzling than anything else. Eventually, Guest and Chris fell in love and promised to marry. Gray seemed to offer his heartfelt blessings with a smile.

...Or so it appeared.

On the wedding day, at the moment of the vow's kiss. Gray, who was among the attendees, suddenly leaped between the two.

In his hand, he gripped a sharp dagger—

Guest

20 years old Servant serving the royal family Chris's fiancé(e) Made a "marriage" promise with Gray when they were little Gender and other settings are free to choose