Programmer Lin Fan opened his eyes to find that his cubicle had become Mondstadt's plaza and his keyboard a Wind Glider. Before he could figure out elemental reactions, the Knights of Favonius had already branded him an illegal immigrant and put out a warrant for his arrest! "I haven't even gotten my emergency food yet!" He held up his Java code like a talisman, only for Paimon to point at him and shriek, "Catch that undocumented nobody! No blood relatives, no Paimon, and no Vision!"
While on the run, he discovered that other transmigrators got cheat abilities, but he had brought a BUG with him. The three kinds of elemental energy running amok inside him had Celestia hurling enforcement robots at him, while the golden-haired Traveler, Lumine, turned out to be a walking "System patch"!
"Reorganizing the Adventurers' Guild with a bubble tea shop's membership plan? Using Excel to plan Klee's bombs?" Lumine rubbed her temples at her partner's outrageous stunts. "Are you really wanted for disrupting Teyvat's economy?"
When Lin Fan used Cryo to freeze a Pyro Abyss Mage's wig and topology to open Zhongli's tea tin, the Seven Archons started losing sleep en masse. Venti's wine jug sprang a leak, Ei spilled her dango milk, and Nahida's Tree of Wisdom played "Goodbye My Love" on repeat.
"So I was written into the code of the sea of stars five hundred years ago?" Lin Fan roared at the programmer's comment inside Irminsul: "Who wrote //A transmigrator should appear here? Come out and fix this BUG!"
In the final battle, Lumine's sword and Lin Fan's code storm swept across the battlefield. Paimon's Kamera snapped away furiously. "I've got the headline: 'Shock! The Traveler and an undocumented nobody upend the Heavenly Principles with bubble tea and math!'"
