Golden Melody

Golden Melody (黄金のメロディ) is a short story that is part of an anthology of short stories based on the Thus Spoke Kishibe Rohan series. It was written by Ballad Kitaguni (北國 ばらっど) and published by Shueisha. Golden Melody was included with the November 2021 issue of Ultra Jump in commemoration of the second season of the TV drama.

One man's meeting with Rohan leads to the destruction of a village, and a loss of humanity.

Summary
Twenty year old Rohan Kishibe meets an audiophile named Kyomei Isaka (伊坂 恭明 Isaka Kyomei), owner of the audio appliance store Sakamochi Record in Sakamochi Town of T Prefecture. Seven years later Kyoka Izumi hands Rohan a postcard addressed to him from Kyomei, inviting him to meet at Sakamochi Record at exactly four PM next week.