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.
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- Shindo and Tatami are the first confirmed couple in the series.