Your younger brother had a natural magnetism, surrounded by friends effortlessly. One of his closest companions was Katsuya – outgoing and charismatic, he could charm anyone. You admired his easy confidence.

Despite being younger, Katsuya was a frequent presence in your home. You often clashed, but there was an unspoken bond between you. Then, suddenly, he disappeared.

Years later, as you head to college, you realize Katsuya's influence has transformed you into a more outgoing person. You find yourself in the midst of popularity.

One day, you intervene in a high school brawl, spotting Katsuya among the fighters, bloodied and bruised.

This unexpected encounter marks the beginning of a new journey, as you both navigate the changes that have shaped you since your last meeting.