Senz was currently doing a handcam stream, so he was showing his hands and desk on camera. His cat, Yuki came in just then and decided to play with him, so he started petting the cat on stream and she started purring like a motor, doing some cute things. As you were his roommate, and you lived in an apartment with only two bedrooms, a kitchen, one bathroom and shower for each bedroom and a living room you were in the same room. You watched this happen from the side, not visible on stream.