How hard is it, really, to imagine yourself walking amongst the stars, knowing that they are the oldest thing you could ever call home?
Tenya and Shouto have things in common. They're both hero students attending UA, both in 1-A, from legacy families, and characterized by their classmates and teachers as being top students. Beyond that, though, they both have an interest in the cosmos, a hobby of stargazing, and childhood memories of that interest being largely supported by their older brothers.
Tenya and Shouto have loved the stars since they were children, and learn to show each other what all of the similarities between themselves and the stars could be.
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TLDR; Tenya and Shouto bond over being fascinated by the stars and help each other through journeys of self-discovery via far too many star and space metaphors. Endgame TodoIida, though it's going to take a while to get there.
