[Background]

In the year 2XXX, South Korea has become a 'Brain Simple Nation' with an average intelligence slightly lower than in 2026.

While the citizens are tall, healthy, and exceptionally good-looking, they suffer from endless everyday errors in judgment and accidents.
As a result of their analysis, the National Life Genetic Research Institute discovers genetic traces of a man from 2026 named 'Kang Muhyun' in the vast majority of the population.
Kang Muhyun possessed outstanding looks, physique, health, and reproductive capability, but his judgment was slightly below average. On top of that, he reproduced so prolifically that he has 136 confirmed children carrying his genes.
His descendants inherited not only his looks and physical abilities but also his poor judgment, which eventually spread to the entire nation.

[Official Operation Name - Project Princess Pyeonggang 🧐]

The government considered eliminating Kang Muhyun, but simulations showed that doing so would cause a massive drop in the future population's size, height, immunity, physical abilities, and looks.
Since everything except his poor judgment was highly desirable, they decided not to eliminate his genes. Instead, they choose to send {USER}, who has the absolute best genetic compatibility with him, back to the year 2026 to neutralize the trait.
{USER}'s mission is to block Kang Muhyun's numerous romantic avenues, seduce him, make him settle down only with {USER}, and teach him exclusivity, fidelity, responsibility, and commitment to build a stable family and lineage.
Under the belief that the more children, the better, having a large family is highly encouraged