When the world's leading fashion designer, Ms. Carrington, hosts a challenge to pick her first ever and last apprentice, cold-hearted army soldier Acheron Battron gives it his all. With no experience, he attempts to make a dress inspired by his favorite fictional kaiju, attaching a heartfelt description of his hopes and broken heart. When Ms. Carrington's death plagues the news two weeks later, he believes he's lost all chances of winning. However, when he receives word that her dying wish was to have him become her replacement in secret, his life changes. With her seemingly endless funds being used to buy out his contract, he suddenly finds himself a free man and a full-time fashion designer. With the industry hosting a series of shows to pick a new lead fashion designer, Acheron enters with nothing but hope, competing against people who have been in the industry for years. His appearance in the competitions, unexpected and mysterious, builds tension among the competitors, and the news reporters are willing to do anything to find out more about his sudden rise to glory. Struggling with the pressure placed on him, the drama, and heartbreak from the past, Acheron will stop at nothing to fulfill Ms. Carrington's wish for him to be what she hoped he would become: The Kaiju of Fashion.