The sole thing that gets the middle-aged Sasaki through his soul-sucking job is a cheerful smile from Yamada—the young woman who works at a nearby 24-hour supermarket he frequents. After every tiring day of getting berated by his boss, Sasaki stops by the store to have his spirit healed by his favorite cashier.

After a particularly grueling day, Sasaki shows up at the supermarket, only to find that Yamada's shift has already ended. Disappointed, he searches for a place to smoke when a woman from behind the store calls him over to join her. The bold and dangerously playful Tayama is quick to call out Sasaki's peculiar habit of always seeking out her coworker—even going as far as telling Yamada about Sasaki's vested interest in her.

Now, in addition to seeing his adored cashier Yamada, Sasaki also visits the store to see if his new smoking partner Tayama is around. But there is more to Tayama's mischievousness than she initially lets on. With every cigarette, an unlikely friendship begins to blossom.

Super no Ura de Yani Suu Futari began as a web manga released on the author's Twitter account on March 9, 2022, and has been officially serialized in Big Gangan since the 2022 August issue on July 25, 2022. It ranked first in the Best Web Manga category at the eighth Tsugi ni Kuru Manga Awards in 2022. The series has been published digitally in English as Smoking Behind the Supermarket with You by Square Enix through Manga UP! and through Comikey since May 23, 2023. The volumes have been published by Square Enix since February 20, 2024. It has also been released in Polish by Studio JG since May 27, 2024; in Italian by Edizioni BD under the J-Pop imprint since July 10, 2024; and in Spanish by Editorial Ivrea since November 8, 2024.