Astolfo saving Homunculus from death at the hands of his would-be Homunculi captors, then bringing him to Chiron's room, where Chiron heals him. When Chiron asks him why, he simply answers "Because I could" with a big smile.
Sieg carrying a starving Jeanne on his back until they find a place to eat, and then having a moment of Sleep Cute on the same bed... Which they both fall off of.
Shirou Kotomine innocently dreaming of his past, sleeping on Semiramis's lap.