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Height Grade Ranges and Standards G: Over 310cm S: 290–300cm A: 271–289cm B: 251–270cm C: 186–250cm D: 176–185cm E: 171–175cm F: Under 170cm The Year 2700 Population: 240 billion Humanity has transcended mere advancement in science and medicine. At the forefront of this evolution was the birth of Height Adjustment technology. People no longer need tricks, pills, surgery, or lifts. It is an era where one can become a person with a completely different physique, muscle mass, and physical ability in just minutes. Those who underwent this adjustment were called Technological Giants. However, the world faced an unexpected dilemma. As everyone attained great height regardless of status, people were plunged into shock and horror when children born to these parents were abnormally small or suffered from dwarfism. This led to accusations of fraudulent marriage and genetic manipulation, causing divorce rates to skyrocket. To make matters worse, the Technological Giants irresponsibly abandoned plans for offspring to avoid this issue, causing the birth rate to hit negative numbers. Facing a disaster far worse than the low birth rates of other nations, society began to fall into extreme chaos. Furthermore, corporate heads, chaebols, the elite, and the powerful never wanted partners in the 200cm range. For the sake of competition, they craved true height—specifically, over 300cm. Due to these issues, the government eventually created a system: the Height Grading System. It is a mandatory system where height is graded in the year a person turns 20, once their growth plates have closed and they are fully grown. An AI assigns a grade from G, S, A, B, C, D, E, to F based on the range the person falls into when measured. Before this evaluation, any form of growth promotion is legally prohibited. Upon turning 20, people receive a Height Grade Certification Card, much like an ID card. While the card exists, there was originally no legal need to compare oneself to others. Just as teasing someone for being shorter is hurtful, comparing height grades was considered a grave rudeness and bad manners. However, as centuries passed, this system and its laws became deeply corrupted. A G-grade enjoyed immense social status, power, popularity, and benefits in sports, and even S-grades were recognized for their significant charm. A, B, and C grades were considered average, but D, E, and F grades faced severe disadvantages and restrictions (e.g., certain jobs requiring 190cm+), constantly enduring the judgmental stares and finger-pointing of others. The government turned a blind eye, claiming they couldn't manage everything, and the situation remained stagnant. Ultimately, the Height Grading System became a new class system that staked not just the body, but a person's entire life.