The Sansha Sanyou (Three Leaves, Three Colors) specials consist of three unaired OVA episodes released as bonuses with the first three Blu-ray and DVD volumes in 2016. These short, character-focused episodes include "Mushrooms are Good for you!", "High Grade Wagyu Taste Testing," and "Smart Girls Measure by Eye". Read a full discussion of the specials on Reddit .
[Spoilers] Sansha Sanyou Specials - Episodes 1 - 3 discussion Sansha Sanyou Specials