ShinKami

KamiShin is the slash ship between Denki Kaminari and Hitoshi Shinso from the My Hero Academia fandom.

Canon
Hitoshi teamed up with Denki during the first round of the Joint Training Battle. Despite his distant and cold attitude, Denki tries to strengthen ties with him, even defends him when Katsuki describes him like a dead weight for the exercise due to his lack of experience.

After the initial clash with the 1-B team, Hitoshi is well aware that his inexperience in battle and apologizes for his slowness in capturing Jurota Shishida, but Denki points out that what he was able to stop Jurota, avoiding the total defeat of 1-A team, and tells Hitoshi that he likes him and he's rooting for him to become a great hero some day. Denki compliments Hitoshi a lot during this time.

In one panel, Denki says to Hitoshi, “You have the face of a popular guy. You’re popular with the ladies, yeah? Trust me, I can tell.” Implying that Denki thinks Hitoshi is attractive.

Fanon
Their friendship is often compared to All Might x Sir Nighteye, EraserMic, MiriTama, and KiriBaku, due to the introverted dark haired boy/man x loud blond extrovert trope.

It is considered a rare pair due to it not being very popular in the fandom, presumably because only a small portion of the fandom follows the manga. Despite being low in numbers, there is a considerable amount of content for KamiShin, especially on Tumblr and AO3. There is also a lot of memes and fanfictions that mention Present Mic, Kaminari, Kirishima, Mirio, and Deku becoming friends with Eraserhead, Shinso, Bakugo, Tamaki, and Todoroki respectively, due to the parallels. Prior to meeting the first five listed characters, the latter five had no close friends but warmed up after meeting them.

Many see their relationship in a sweet and innocent light. Usually with Kaminari being one of the rare people who do not fear or shun Hitoshi for his powerful quirk, and interacts with him despite of the dangers of being brainwashed. Shinsou's cold exterior slowly crumbles the more he hangs around Kaminari. In fan works like these, Hitoshi has already transfered to the hero course and is in Class 1-A, where he is quickly befriended by Kaminari and his friends.

There are also AUs where Shinso gave up on his dream of becoming a hero due to his quirk being so frowned upon and ends up becoming a member of the League of Villains. But he falls in love with someone who accepted him for who he is (Kaminari) and betrays the League for the heroes.

On AO3, it is the most written ship for Hitoshi, and the second most written for Denki.

Fandom
FAN FICTION 

TUMBLR