17-year-old high-schooler Suzu lives with her father in a country-town in Kouchi. She lost her mother when she was young and has closed her heart away from the real world. But she came to join the so-called “other reality,” a supermassive virtual space called “U” with an avatar. When Suzu became the songstress recognized all around the world with her peerless singing voice in an instant, she meets the mysterious existence, feared and called the “dragon”—