SangHun

SangHun is the slash ship between Cho Sangwoo and Seong Gihun from the Squid Game fandom.

Canon
Sangwoo and Gihun actually have known each other since they were children. They would often go to Sangwoo's house to play outdoor games especially the famous squid game. Their strong friendship soon got faded away after Sangwoo left for business to travel to America and doesn't often stay in contact with his friend which leaves Gihun to take care of Sangwoo's mother.

Fanon
SangHun is a popular ship within the fandom mostly because they've known each other when they were younger before the Squid Game. Some fans would also ship this because of the "friends-to-enemies" trope among drama thriller shows. Even though this is quite famous, some fans would abandon this ship because of Sangwoo and Gihun's attempt to kill each other on the last episode even though they tried to reconciled their problems at the last minute of the game. One of the memorable moments of this ship being sailed is when Sangwoo decided to sacrifice himself instead of giving his hand to Gihun in order to let his friend win the the cash prize and the game. There are currently 30+ fanfics on A03 and is the second most written ship behind SaebYeong.