This chapter confirms a suspicion that i had, Shiraishi face is much more cute/beauty, than what we usually see. I'm starting to think that his mob face, is just something that we the readers and the majority of people see, because he doesn't stand outs, so their brains doesn't even cares to memorize his appearance, so this bland face is a product of his "invisibility". So Kubo, the person who is able to deflect his "invisibility" and is able to see him all the time, is the only person in the entire manga, that saw the beauty/cute Shiraishi. So she kinda of have a personal muse, since in the whole world, she's the only person able to perceive his facial characteristics