Changes of Heart, Volume 5 (Changes of Heart #16-19)

Childhood friends, Hijir and Koyori are now officially together. On top of that, Koyori's been put in charge of a project at work, and she also just moved in with Hijiri. Smooth sailing from here on out! Or so she thought... as their start having less time available to see each other, and she begins noticing small annoyances as they live together. What an ordeal for this childhood friends-turned-couple!