AtsuGin

AtsuGin is the het ship between Atsushi Nakajima and Gin Akutagawa from the Bungou Stray Dogs fandom.

Canon
Atsushi Nakajima and Gin Akutagawa first meet after Katai Tayama requests that Atsushi and Doppo Kunikida find the young woman who Katai is in love with.

During the Guild Aftermath Arc, Atsushi and Kunikida go to a broker who is also a former Armed Detective Agency member in order to look into the Moby Dick console. The two of them arrive at the broker's home, only to find him in a poor state. The broker's name is Katai Tayama, and he refused to help the agency look into the Moby Dick console until he found the one he loved in person. The person he loves is a beautiful young woman, whom he took a picture of and described as "Yamato Nadeshiko". After looking at the photo, Atsushi thought and stated that the young woman is very pretty.

At a different time, implied to be the day before, while driving, Ichiyou Higuchi sees Ryuunosuke Akutagawa going home with the same young woman that Atsushi and Kunikida were looking for the day after. Jealous and infuriated, Higuchi plots to find the young woman and receive information on why she was with Akutagawa the day before.

While Higuchi is trying to find the beautiful young woman, she is found by Atsushi and Kunikida. Kunikida then interrogates Higuchi, to which she responds by asking them if they know the identity of the young woman in the photo that Atsushi was holding. Atsushi tells her that they don't know the identity of the young woman either, but that they're trying to deliver a love letter to her. Higuchi then mistakes Atsushi for the one sending the young woman a love letter, thinking that he is "surprisingly bold". However, this leads her to realize that if Atsushi gives the young woman a love letter, then Akutagawa will supposedly break up with her, making Akutagawa available as her lover.

Higuchi then gives Atsushi her support and gives him advice on how to approach women in order to increase the chances of the young woman dating Atsushi. Atsushi didn't correct Higuchi's misunderstanding of who was sending the love letter, making it possible that he didn't mind ending up with Gin. However, Katai interrupts the conversation and announces that he is the one who is delivering the letter, not Atsushi. The young woman then comes out of the dry cleaners, carrying Akutagawa's clothes. Atsushi points this out, causing Higuchi and Katai to chase after the young woman. It is then revealed that the young woman was Akutagawa's younger sister all along, Gin Akutagawa. Atsushi, Higuchi, and Kunikida are surprised that the beautiful young woman was Gin Akutagawa, causing Atsushi to say in a surprised tone that she's Akutagawa's little sister. After which, Katai gives his love letter to Gin, only for her to reject him. Although Gin is Akutagawa's younger sister and is therefore associated with Atsushi's enemy, Atsushi didn't have or show any negative feelings towards Gin, and even though Atsushi is her brother's enemy, she didn't have or show any negative feelings towards Atsushi either.

BEAST Universe
Atsushi and Gin refer to each other with the honorific "San" in the BEAST alternate universe, as both of them are professional coworkers and acquaintances in the BEAST universe. It is currently unknown how they refer to each other in the original universe, however.

Gin saves Atsushi from her brother's violence twice, the first time by stabbing him as she says it was the necessary thing to do to save Atsushi-san, and the second time by telling her brother through a microphone to stop his violent acts; otherwise, Akutagawa will kill Atsushi.

Quotes
"You're right, she's really pretty."

- Atsushi to the picture of Gin on Katai Tayama's phone

Fanon
AtsuGin is considered a rare pair within the Bungou Stray Dogs fandom, as the two have had very few interactions with each other. Some speculate that they will have more interactions in the future as a result of Gin's older brother's (Akutagawa) current status. Its rival ships are TachiGin, HiguGin, Shin Soukoku, AtsuLucy, and AtsuKyou.

Fandom

 * FAN FICTION
 * TUMBLR
 * TUMBLR
 * TUMBLR

Trivia

 * Atsushi and Gin have around an eight-centimeter height difference, with Atsushi being 170 centimeters tall and Gin being an estimated 162 centimeters tall.
 * In the official Bungou Stray Dogs: Tales of the Lost Mayoi mobile game, both of them have two matching Mayoi cards. In the Chocolat and Sweets scout, both Gin and Atsushi are sitting on their respective desserts while holding a human-sized utensil. Atsushi's card is strawberry cake-themed, while Gin's card is mint chocolate-themed. While Atsushi is sitting on a strawberry cake, Gin is sitting on top of a scoop of mint chocolate chip ice cream. In the Jiangshi scout, both of them are featured next to each other on the scout banner.
 * Both of them grew up in harsh conditions during their childhood and are both orphans, with Atsushi growing up in an abusive orphanage and Gin growing up in the slums of Yokohama.
 * Both of them have a good relationship with Dazai, as shown through Dazai's interactions with Atsushi when they have their friendly comedic moments, and as shown through Dazai's interactions with Gin, as he's noticeably much more caring towards Gin than her brother Akutagawa.
 * Gin is the only girl that Atsushi has ever thought of and stated as being beautiful, pretty, or attractive.
 * Both of them are close to Akutagawa, but in different ways. Akutagawa and Atsushi are rivals and enemies, while Gin is Akutagawa's sister.
 * Despite Gin being Akutagawa's sister, who is therefore associated with Atsushi's biggest rival and enemy, he doesn't show or have any negative feelings towards Gin in both the canon universe and the BEAST universe. The same can be said for Gin, who doesn't show or have any negative feelings towards Atsushi despite him being her brother's enemy and rival.
 * Although not much is known about Gin, it is commonly speculated that Gin is a kind and truly sweet person behind her tough Port Mafia exterior, making both her and Atsushi similar in personality, as Atsushi himself is a kind person who has a sweet personality.