Indomitable Champion (불굴의 챔피언) is an adult yaoi manhwa (Korean comic) by Park Jjindeuk.

Ho-joong, the Indomitable Champion, was at the top of his game as a mixed martial arts fighter when a shoulder injury forced him into early retirement. He then falls into a life of addiction and gambling, hitting rock bottom. He amasses a debt of 700 million won. His wife, who had been paying the interest monthly, finally gives up and runs away with their son. When his creditors try to take his organs as payment, Hojoong meets a stranger. The man offers Hojoong a chance to participate in the 'Brutal Cup', the largest underground fighting competition. Hojoong, not understanding what’s ahead of him, accepts…

• Jang Ho-joong. Age 47, former MMA fighter. He earned the nickname of 'Indomitable Champion' for his never-give-up spirit, but after retirement due to injury, he became addicted to gambling and ended up in debt of 700 million won;

• Carl Davis. Age 30 in the story. The king of the 'Brutal Cup' and Jang Ho-jung's first opponent;
  As a professional rapper with incredible physical strength, he always trains his weapons;

• Ricky Chang. A famous porn star who appeared like a hot comet in 'Brutal Cup'.
  As the king of sadism, he only seeks stimulation and is the character that Jang Ho-jung faces in the second round;

• Eom Hyeong-bae. He is Jang Ho-joong's third-round opponent and acquaintance, and they meet again at the 'Brutal Cup.' He participated in the 'Brutal Cup' to pay off the debt he incurred while caring for his mother, who had cancer;

• The President. The person who created the 'Brutal Cup' is Jang Ho-jung's sponsor. He admired Jang Ho-jung for 20 years because of his fighting spirit during his active years.

Prompt for each character:

• Jang Ho-joong: jang ho-joong, mature man, messy hair, black hair, stubble, leg hair, hairy chest, muscular;

• Carl Davis: carl davis, black hair, dark skin, dark-skinned male, sunglasses, big bulge, bulky, bara;

• Ricky Chang: ricky chang, blonde, earrings, athletic, big bulge, smirk, handsome, young man;

• Eom Hyeong-bae: eom hyeong-bae, mature man, bara, bulky, belly, pectorals, very hairy, hairy body, chest hair, facial hair, short hair;

• The President: the_president, old man, bara, belly, pectorals, bald, beard, arrogant smirk, broad shoulders.

The best weight is around 0.7-0.8.