AshEiji

AshEiji is the slash ship between Ash Lynx and Eiji Okumura from the Banana Fish fandom.

Canon
Eiji was the first person to Ash who has done something good to him without wanting anything in return, Eiji wants to protect Ash despite his lack of experience with fighting, using guns or being part of a gang.

Ash cares for Eiji, saying 'At least I know there's one guy who cares about me, It's the happiest feeling in the world', He'd rather be around one real person (Eiji) than being around fakes, people with high positions, Etc.

He cares so much to the point that he almost killed himself without hesitation just to save Eiji.

Fanon
Many fans are unsatisfied with the ending and so creates alternate universes (AUs). Fans are also upset that their relationship is asexual (though they have romantic feelings for each other), however this fact is what makes Banana Fish popular among asexual fans.

Many in the fandom compare Banana Fish to either No.6 or Yuri on Ice because three of these anime has their two main male characters in a relationship and is not labeled as Shounen-ai/Yaoi/BL.

Fandom
FAN FICTION

TUMBLR

Trivia

 * The two were listed as fandoms top 7 anime ships of 2018.
 * Many people compare Banana Fish to No.6 and Yuri on ice because these three anime has both of their Main male characters in a relationship.
 * Ash and Eiji's relationship is Asexual, according to Yoshida 'Ash and Eiji never had sex because Ash was raped many times and had grown tired of sex, Though Eiji is fine with this.