Aka x Kuro

Renji Shiba is 17 years old who goes to a kickboxing gym. The coaches' expectations of him are high and Renji has absolute confidence in his abilities. But unable to find anyone who exceeds his level, Renji no longer finds satisfaction in fighting. One night, returning home from the gym, the boy comes across a man wearing a Noh mask who violently assaults him, leaving him unconscious on the ground. Upon awakening, Renji will have only one goal: to seek a rematch with this worthy opponent!

Includes 3 extra chapters:
- Extra 1 "Max";
- Extra 2 "Box";
- Extra 3 "Kix".