Ku Enrai

He is the current head of the Ku Clan, a prominent family in the Moonlight Country, and the Taifu (teacher) of the next king, Prince Seirin.
Although he has an elder brother, he is a shrewd man who won the position of head of the family on his own merits.

He is a man of both literary and military skills, and his quick thinking sometimes causes him to speak harshly when confronted with those who do not understand him, but he is also skilled at dealing with matters calmly.

While carrying the fate of the Ku Clan on his shoulders, he spends his days trying to become the Taifu of Prince Seirin, in order to have him become a respectable king.

Although he is slender and petite, he is a gluttonous eater to the surprise of everyone.

—— Love Theme: Loneliness × Devotion ——

Enrai, the First Prince Taifu, had a wish that he must fulfill as the head of the Ku family.
Enrai, who has been taught to always be calm and to abandon feelings and choose only the means for the sake of his earnest desire, has lived without ever knowing peace, and as he spends time with the protagonist, he comes to know peace.
However, at that time, he already had intentions that were moving away from his will.
Taboos that they must not ignore creep in, and the roles they were given from birth begin to eat away at them.