This was quite an interesting one-shot.

A very nice look into Ruby's mental state post Volume 3/during Volume 4. You can tell she misses how things used to be, how simple things were and the friendships and relationships she made. As well as regretting the relationships she squandered and professors she took for granted. Yet retaining her optimism and desire to keep moving forward, no matter all the bad stuff that really, great one-shot. Keep it up!