Here's the final rrat. Pekora and Miko are not a yuribait couple but they are a lesbian couple irl. They're just trying to hide their relationship in public because it's taboo.
Some evidence:
- Pekora gifted Miko a rabbit plushie as a Christmas present to remind Miko of her when she's feeling lonely
https://youtu.be/SnJw4OHwFXI- Also pic related, because only a couple would do that