a-q-d:

Hey Sam!

Sorry it took me forever to answer your ask.

24: Which one gives the other a piggyback ride when they’re tired?

Kanda, because a) he enjoys carrying Lavi, because Lavi always admires
how strong he is (because it’s true and he likes the smug glint in Kanda’s eyes
whenever he says it) and b) Kanda doesn’t like piggyback rides. He only allowed
Lavi to carry him once, because of a leg injury (in canon on a mission and in a
modern au because he slipped). Kanda is not a big fan of public displays of
affection, which Lavi respects and so he mostly only asks for piggyback rides
when they’re alone, for example at home or on a hike.

29: Which one holds the umbrella over both of them when it rains?

Both of them do. Kanda complains every time Lavi holds the umbrella,
because he’s flustered and blushing and hates every second of it, while Lavi is
delighted, because it’s adorable. When Kanda holds the umbrella, Lavi blushes,
too, but only a little. He enjoys it a lot (just like the piggyback rides),
because he feels so cared for. He lets Kanda take the umbrella the most of the
times, because he knows that Kanda enjoys looking out for him. Since Kanda
doesn’t like holding hands in public, Lavi bumps their shoulders together whenever
they stop at a red light. They both get a little wet, since they’re quite tall,
but they don’t care.

Thank you very much for the ask! This was fun.