"...hey, Inori-kun."
(Inori walks over to the freezer and grabs an ice cream tube then plops down at the table to start eating directly from it with a spoon.)
(Harutsugu and Kuroji both notice the way Tōkan looks at Inori and look at each other in, respectively, despair and deep fondness.)
(Tōkan notices this out of the corner of his eye but doesn't give it much attention. Watching his boyfriend be constantly adorable is very diverting.)
He doesn't say "You are?" because by this point Inori just basically does whatever he wants and if he wants to sleep over at Tōkan's, Tōkan is more than happy to have him.
Harutsugu and Kuroji once again exchange looks, but this time they're less immediately easy to decode.
Harutsugu finishes stitching Tōkan up and tells him to go see a doctor if he starts getting a fever or anything like that, observing that alpha males are more prone to infection than the rest of the population.
"I think we have higher rates of immunodeficiency," he explains. "Omegas have better immune systems, that's one of the reasons why we think your sister's a beta even though we can't fully tell yet, she's caught a lot more colds than you had by her age and you hadn't even ever caught a flu by then."
The cookies are done soon enough, and they all relocate to the tea room to have them. Inori, of course, continues to be an absolute black hole. Tōkan supposes they never did get that ice cream anyway.
But after they're all done (which means Harutsugu, Kuroji, Tōkan, and Suzume have had some cookies and tea while Inori inhaled everything they didn't consume) and Suzume's excused herself to go back to her room, Harutsugu says, "Tōkan-kun, Inori-kun, could you stay here for a few more minutes? There was something Kuroji and I wanted to talk to the two of you about."
"So... you're an alpha/omega couple," starts Kuroji, rubbing a hand against the back of his head. "There are some... unique challenges to that nowadays."
"How are your parents taking this, Tōkan-kun? 🤔" asks Harutsugu. "I realise we've been remiss in not asking about them all this time."