1st Couple - Uke is a house cat and seme is a street cat. Uke goes into heat but doesn't know what it is, asks seme to help him at park.
2nd Couple - Uke used to be leader of cats, seme idolized uke. Uke ends up leaving for a bit and returns to town but gets caught. Saved by seme.
Hatsujou Kemono Biyori