To me the whole thing just feels shoehorned in. Like they were trying to find a way to make this feel more like a dating sim by bringing in as many love interests as possible.
I honestly liked it better when they just kept the main focus on the food. They should have done that and then waited until she was 15 or 16 and then slowly being in a serious love interest.
But first the prince, which is like, whatever, though the 13 year old falling for a then 8 year old just gives a bit of an ick. Then they revealed Sei as an actual guy. Now the brother isn't an actual brother and is in love with her?
Yeah, this is just too ham-fisted...
It was an ok story until that brother went and
spoiler
Proposed to her?
Wtf bro