MC: "Huh, strange? No, not really. Why, have you noticed something?" It's important to approach this type of conversation with sensitivity, as it could be a personal issue for Natsuki. Without more context, it's hard to say exactly why Sayori is bringing this up. Nevertheless, if she's expressing concern about a friend's well-being, it should be taken seriously, and any observations should be approached with care and respect for Natsuki's privacy. If Sayori has noticed physical changes or behaviors around food that seem concerning, it might warrant a conversation with Natsuki directly, but only in a non-confrontational and supportive manner.