, shortened as KiniOto or TGSWIIWAGAA and more popularly known as the Green Yuri due to its distinct green accent color, is a Japanese manga series written and illustrated by Sumiko Arai. Originating as a short story posted on Arai's Twitter account from July to September 2021, the series started its current weekly run each Sunday on the platform in April 2022, before being serialized on Pixiv Comic in April 2023. Kadokawa Shoten published the series in print in the same month, with its chapters collected in four volumes as of February 2026.
The series has been a critical and commercial success, with critics praising the story, artwork, and characters. It won the 2023 Next Manga Award in the web manga category.
An anime adaptation has been announced.
Aya Oosawa has developed a crush on the clerk of the record store she frequents as they share their love for rock music. Unbeknownst to her, the store clerk is her female classmate Mitsuki Koga. The story follows the budding relationship between Aya and Mitsuki as they experience life within and beyond high school with their friends, while finding out how much they mean to each other.
In an interview with Shuko Yokoi, Sumiko Arai shared that the concept of The Guy She Was Interested in Wasn't a Guy at All originated from her being drawn to stories about individuals from differing backgrounds connecting and wanting to tell a story about girls, noting in another interview with Anime News Network that "woman-loving-woman media in general is unique and special as it is". In order for her concepts to also resonate with international readers, she drew short stories featuring no dialogue, which were posted to Twitter. One of these short stories, uploaded between July and September 2021, served as the inspiration to the series.
In creating the characters of Mitsuki Koga and Aya Oosawa, Arai shared she used the extroverted and introverted aspects of herself as inspiration in writing them while also drawing from the characters of Shelby Goodkind and Toni Shalifoe in The Wilds, creating a "polar-opposite kind of pairingâÂÂ. She also expounded on the decision to incorporate music as a major element in the story, believing that music is a great way to "find a community" and noting that she grew up with a "lot of foreign music" such as Beck, The Beatles, and Half Moon Run.
Since Twitter only allows four images per Tweet, chapters of the series are limited to four pages. As a result, Mitsuki and Aya's interactions have to be depicted concisely. The series' editor commented that the character's faces are illustrated to be detailed enough to understand the story without the dialogue, which makes the series more accessible to foreign Twitter users. The yellow-green color which serves as an accent to the black-and-white illustrations was stated by Arai to be a late addition before the first chapter was uploaded.
Written and illustrated by Sumiko Arai, the series began its weekly run on the author's Twitter account on April 10, 2022; it was also serialized on Pixiv Comic on April 29, 2023. Kadokawa Shoten began publishing the series in print in the same month, with its chapters collected in four volumes as of February 2026.
Arai announced on April 3, 2024, that the series would be receiving an official English release alongside other international releases, with Yen Press later announcing on April 26 they had licensed the series for English publication.
An anime adaptation was announced by Arai on her Twitter account and Kadokawa Shoten on February 20, 2025, to coincide with the release of the third volume.
Universal Music Japan released an official playlist containing songs that Mitsuki and Aya listen throughout the series to coincide with the release of the first volume, featuring artists such as Nirvana, Turnstile, and Royal Blood, among others. The playlist is periodically updated after the release of a succeeding volume. Arai has also remarked how select songs from the playlist represent Mitsuki and Aya's progress in their relationship.
A pop-up store selling merchandise from the series was open in Ikebukuro from September 15âÂÂ24 and in Nagoya from September 30 to October 9, 2023.
A drama CD adaptation was released on April 24, 2024.
The first volume sold 150,000 copies within a week of its release. By September 2023, the series had 200,000 copies in circulation.
A columnist for Animate Times praised the artwork, particularly its use of color, and the story's progression. Momo Tachibana of Real Sound praised the main characters and their interactions, describing them as understandable. Erica Friedman felt the story was "not the first of kind" but that it handled its subject better than similar series. Friedman also praised the artwork and its use of black, white, and green. Lucas Kloberdanz-Dyck of Collider praised the manga for its tasteful exploration of queer relationships.