PART A: Sadaharu isn't feeling well, and eventually everyone realizes he's in "heat". In order to find Sadaharu a mate, they travel to the local park used by other dog owners.
PART B: After Katsura breaks up a Jiou meeting after the members keep talking about the drama "Summer Sonata", he tries to rent the first DVD, but is asked to provide a driving license as proof of identity. To obtain a license, Katsura joins a driving school, and winds up in a co-learning session with Gintoki.