There haven't been many interactions between the pair, but they seem to be on good terms and close friends, and both belong to Ketsubutsu Academy High School. In several flashbacks they have been seen training with their teammates and they along with their teammates have shown good teamwork.
They both debuted with their peers in history during the Provisional Hero License Exam arc with their teacher, Ms. Joke. Tatami was lovingly touching Shindo's back and then they introduced themselves to the students from Class 1-A. They both show admiration towards the students and after finishing talking to the students, they go to put on their hero costumes to start the Exam.
After the Paranormal Liberation War ended, Shindo and Tatami were walking through an abandoned city talking quietly as they prepared to search for a group of civilians to send towards the evacuation zones. The two arrive at the location of the civilian group and after they cannot be persuaded to evacuate, they both leave the building disappointed and Shindo is enraged by the arrogance of the civilians, as Tatami scolds him.
Suddenly, Tatami receives an alert call from his classmate Shikkui Makabe and he yells at both of them to run away because a villain was approaching their location and Muscular quickly appears jumping on a building, surprising Shindo and Tatami. Shindo prepares to fight the Villain and tells Tatami to flee and evacuate the civilians. Shindo confronts Muscular and for many times during the fight Tatami can be seen screaming in concern and terror for Shindo, until Izuku comes to save him.
Shingame is a little known ship due to lack of screentime for both Shindo and Tatami. However, the ship quickly gained attention due to the release of the Ultra Analysis data book, where it was revealed on their character sheets that the two are a couple. It is currently the most popular ship for both characters, due to its canon status, the only noteworthy rival ship would be Shindo's ship with Izuku. As already mentioned due to the lack of screentime for both characters, the ship has little to no fan-content. Theres also a big part of the fandom that isn't even aware that Shindo and Tatami are dating, due it being only confirmed in the Ultra Analysis data book and never shown in the actual manga/anime.
- The Ultra Analysis data book revealed that Shindo and Tatami are dating, making them the first confirmed couple in the series.