Shinsai

Shinsai is the slash ship between Shuichi Saihara and Korekiyo Shinguji from the Danganronpa fandom.

Canon
Shuichi and Kaede first meet Korekiyo in Chapter 1 as they go to look at the school's front door. The two are trying to decide whether or not it's dangerous to open it and Korekiyo interrupts them, saying he has already examined the doors and that they shouldn't worry. He gives a simple introduction afterwards, asking to be referred to as "Kiyo" instead. Upon seeing Kaede's confusion about his talent, he provides a basic explanation about anthropology.

After the events of Chapter 1, Shuichi continues to think of Korekiyo as creepy but gains more trust in him. On Korekiyo's end, he considers Shuichi a good friend. Korekiyo also offers to help Shuichi connect with Kaede's spirit, to which Shuichi declines, saying that the only thing he had to say to the fallen was that he and the others managed to survive and escape. During Korekiyo's Free Time events, he gives Shuichi a lesson on anthropology each session spent together. The more time you spend with Korekiyo, the more routine this becomes, picking up where they left off every time. On the last Free Time event, the two promise to travel the world together so that Korekiyo may show Shuichi the beauty of humanity.