Similar to the Gunbuster! Science Lesson these are short “omake” bonus features bundled on the Blu-ray Box Complete Edition of the Top wo Nerae 2! Diebuster.
Each short lasts around three minutes, and features super deformed versions of Nono, Lal`C Melk Mark and the Dix-Neuf explaining the various scientific aspects of the series.
Please scroll down to choose servers and episodes.