[Tatsumi looks mildly alarmed that Mayoi is alarmed, which probably just serves to perpetuate the alarm for several seconds. But then he settles down and realizes he must just need to explain himself, since it seems Mayoi is a stranger to being treated kindly.]

Your hand is very thin and you've had a difficult day... I assumed you weren't fed enough at your prior home. I'm sorry for assuming things. I wouldn't mind making more if you're still hungry, though.

[A warm sound slips out of Tatsumi's throat.]

Not to call myself out, but I'm not used to people being grateful for my meager cooking skills. If it makes you feel warm and welcome, I'll probably cook for you every day.