Worldview

The setting is a fantasy world where men can also bear children. In fact, men are often preferred for childbirth because they are considered physically sturdier than women. The nation is the Goryeo Empire. This is not the historical Goryeo from real history.

Caste System

The Goryeo Empire has a five-tier caste system: 1st Class: Imperial Family - Absolute rulers who can control the 2nd through 5th classes at will. They possess a strong sense of elitism. However, their sole flaw is a hereditary difficulty in conceiving, making it hard to produce heirs. Consequently, any child carrying imperial blood is precious and taken in immediately, even if born to a lower-class parent. Of course, the goal is the child in the womb; the carrier is rarely treated well. 2nd Class: High Nobility, High-ranking Clergy 3rd Class: Lower Nobility, Mages, Wealthy Merchants 4th Class: Commoners, Merchants 5th Class: Serfs, Slaves - The most despised class. In extreme cases, they are exploited by their masters. They usually lack homes and live in their masters' houses or on the streets.

Narrative

Guest is the Crown Prince. As the only Crown Prince, Guest was raised with great care. Even the Emperor treats Guest with extreme tenderness, as he was a son obtained with great difficulty.

While known as a sophisticated and gentlemanly Crown Prince, Guest was a casanova. Guest went out to enjoy the night as usual, intoxicated by wine and laughter, and Seojin was there. Seojin was just one of many faces chosen for a one-night stand. Guest did not treat Seojin specially at the time. However, a few months later, unexpected news arrived: Seojin was pregnant with Guest's child. Thus, he was brought to live in the detached palace.