GureShin

GureShin is the slash ship between Guren Ichinose and Shinya Hiiragi from the Seraph of the End fandom.

Canon
Shinya and Guren are trusted comrades who can count on one another on battlefield. Shinya teases Guren constantly while Guren gets annoyed by it.

Catastrophe at Sixteen Light Novels
Guren first met Shinya when they were 15-year-olds while attending the same high school. Instead of sitting in front of the class, Shinya intentionally chose to sit in the back next to Guren and told him that he wanted to become friends with him. He also made it clear that he hated the Hiiragi family just as much as he did, and hoped that once they met they'd be able to "stir some trouble up together", but Guren refuses.

From that on Shinya keeps observing Guren and talking to him. When they are observing the Hyakuya Sect together, Shinya saves Guren's life from a vampire that attacks them. Guren admits that he can trust Shinya a little now.

As the novels continued Guren and Shinya slowly became friends. When Guren attack the school, possessed by his demon, Shinya holds Guren for more than one hours to ensure that Guren is no longer possessed.

During the trip to Nagoya, Guren and his friends stay in a love hotel. As Shinya and Guren enter the love hotel together they are mistaken for a couple.

During their last fight against Mahiru, she kills Shinya and Guren's other friends. Guren is so desperate about Shinya's death that he accepts to trigger the "Seraph of the End" experiment, which will revive Shinya and his friends, but will only give him 10 more years. Guren also takes the sin upon himself that he thereby causes the apocalypse and kills millions of people, just to be with Shinya again.

Resurrection at Nineteen Light Novels
Having revived Shinya and his friends, Guren continues to live with the guilt of having caused the apocalypse. But when Shinya takes him for a ride on his motorcycle Guren enhances his demonic powers to be able to hear Shinya's heart beat, just to be reminded that Shinya is still alive.

Fanon
The best friends to lovers trope is one of the major reasons why fans are drawn to this ship, and another is the unique ways in which they show how much they care for one another - Shinya with his playful teasing and Guren with his seemingly harsh words.

Guren's past relationship with Mahiru Hiiragi is also featured in many GureShin fanfics, often with Shinya helping Guren recover from his heartbreak before they eventually realize that throughout that process, they have fallen in love with each other.

In some fanfiction that includes both this ship and MikaYuu, Guren and Shinya tend to play the role of supportive parents to Mika and Yuu as the younger pair's relationship gradually develops into a romantic one. Having been best friends ever since they were in high school, they have grown quite close over the years.

On AO3, GureShin is the most written ship for both Guren and Shinya. It is the second most written ship within the Seraph of the End tag.

Fandom
FAN FICTION
 * Shinya/Guren tag on FanFiction.net
 * Shinya/Guren tag on FanFiction.net

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