All six specials of GSNK (exclusive to the DVD/blu-ray releases) edited into one video as a normal 20-minute episode (hence "episode 13"). I loved these stories in the manga and felt like they deserved to be in the main anime.
I simply took out most of the eyecatches/chibi sequences and added in the OP and ED. I also tried to make the scene changes less sudden and awkward by inserting random background shots but couldn't do it for all of them 😅
Sorry for the kissanime logo + the mismatching subtitle font towards the end, I downloaded these videos ages ago from different sources 😂
Anime footage taken from online (subs not done by me)
OP + ED translated and subbed by me