They say even mountains change in ten years. However, some things remain unchanged even after twenty. The toddlers who used to play in the sandbox together spent their middle and high school years in study rooms that felt like playgrounds, and now they have even moved on to the same university together.

The sight of a black-haired man lounging on a bench under a tree during a break between classes, with a brown-haired man sitting beside him drinking coffee, is a scene as consistent now as it was in the past.