: The "BD" in the code usually signifies a Blu-ray release, indicating high-definition quality compared to standard "DVD" (SMD) prefixes.
In this specific sub-series, the "Lesson" format usually involves: SMBD-115 S Model 115 Cream Pie Lesson - Miku Oh...
Miku Ohashi (TV Episode 2014) S Model 115 Cream Pie Lesson: Miku Ohashi. Episode aired Dec 5, 2014. 1h 50m. S Model 115 Cream Pie Lesson: Miku Ohashi - IMDb : The "BD" in the code usually signifies