The two only get to spend some time together in one of Danganronpa 2's Chapter 1's Special Time Events, where they discuss how to slice open a coconut.
"Despite having little to no in-game interactions, the Danganronpa 2 artbook reveals that Teruteru thinks his dress code is interesting. Whether he means this sarcastically or literally is unknown.
As for their time together in high school, Kazuichi and Teruteru seem to be friends, supposedly because they both have a bit perverted personality. They are usually seen together in group events, and one time they are seen hugging each other in fear during a riot caused by Reserve Course students."
In episode 6 of Despair Arc, the two tease Fuyuhiko Kuzuryu together about even someone as distanced from the group as him coming for their homeroom teacher's welcome back party. In episode 7, the two fantasize together about "Ryota" and Mikan's relationship. In episode 8, the two hug each other while watching The Parade in terror. Kazuichi gets confused by Teruteru's statement that Nagito Komaeda is within the latter's strikezone after the former complained about having to carry Nagito for so long.
- Kazuichi – “Right now, maybe they're...doing some "extracurricular studies" together...”
- Teruteru – “Somewhere, in the school building, Tsumiki's doughnut and Mitarai's banana...are about to mee-”
- — Kazuichi and Teruteru having some wild fantasies about Twomiki before Gundham's bear interrupts them.
The ship's name is a play on Teruteru's culinary talent as the Ultimate Cook and Kazuichi's last name, which in the English localization is spelled as "Soda" instead of the Japanese "Souda."
The ship sailed as a result of both characters being among Danganronpa's most perverted ones. The fact that both boys with a similar personality came from the same cast also helped. As such, after Teruteru's death in Chapter 1, many fans wondered how Chapter 2 would turn out if Teruteru had lived long enough to potentially go with Kazuichi's plan to attend the girls' beach party, like Hajime did.
While Teruteru's ships tend to be unpopular due to his perverted personality and the character himself being rather unpopular, this ship is one of the most popular ones involving him. Nonetheless, it naturally loses in popularity to Kazuichi's main ships, such as Sounia, Soudam, Sonsoudam, or Soul Friends.
However, the ship is still a minor one and as such doesn't get many fan fictions or fan arts dedicated to it. The two are sometimes also paired with the other perverted Danganronpa characters, Hifumi Yamada and Miu Iruma.
- Kazuichi's relationship with Teruteru on Danganronpa Wiki
- Teruteru's relationship with Kazuichi on Danganronpa Wiki