These are the recollections of a group of men who bet everything on their bicycles. The central pillars of their respective teams, the third years. New stories revealing their pasts are about to begin!

For high schooler Kei—and for at least forty-six others—immortality comes as the nastiest surprise ever. Sadly for Kei, such a feat doesn't make him a superhero. In the eyes of both the general public and governments, he's a rare specimen who needs to be hunted down and handed over to scientists to be experimented on for life—a demi-human who must die a thousand deaths for the benefit of humanity.

Ever since dangerous gates leading to dungeons filled with monsters appeared on Earth a decade ago, humans gained a new way to provide for themselves: certain individuals designated as hunters received otherworldly powers to fight the dangers within. Sung Jin-Woo works desperately as a hunter to keep his family afloat. However, due to his lack of power, he is known as the weakest hunter of all mankind. During a dungeon expedition with his party, an unexpected disaster occurs, leaving Jin-Woo on the brink of death. Inexplicably surviving the grave situation, he wakes up in a hospital after the incident with a surprise—he has been selected as a player by a mysterious system, offering him possibilities to improve his skills. As he is seemingly the only one who has been chosen, Jin-Woo begins to level up at a fast pace, and he might just be able to become the world's strongest hunter with his reawakening.

Ever since her father used up the last of the family fortune and skipped town, Kanae Otowa has lived in her family's ancestral mansion, Otowakan. With no way to pay off her father's debts, Otowakan is being foreclosed and Kanae must oust the remaining residents—her friend Sousuke Kagura, and two strange people who claim to be her father's acquaintances, Wolfgang Amadeus Mozart and Ludwig van Beethoven. After somehow being resurrected, Mozart and Beethoven have started going by "Motes" and "Beethes" respectively, and begun to indulge in a variety of idiotic, non-musical pursuits. While stubbornly refusing to leave Otowakan, Beethes unlocks the hidden power of Musik, saving Otowakan from demolition and delaying his eviction. With this discovery, other Musik users are drawn to Otowakan, including Frédéric Chopin, Franz Liszt, and Franz Schubert. However, not all Musik users have innocent desires. Across the city, the enigmatic Johann Sebastian Bach sits atop a tall building, plotting how to use his Musik.