The first collection didn't get translated but you can see that one here (it's only 2 pages).

I think everyone collectively agreed that's a YES pillow in the music video even though there's no writing on it.

Canon

I do like how Iroha is so attracted to Yachiyo that she starts overloading if she gets close

She may be her girlfriend but she's also her oshi

When your Oshi AI turns out to be actually your gremlin GF you gay panick hard