maybe you should tag the tl? I tried using google lens but it wouldn't highlight the middle but it said something like "leave this behind" so i guess it refers to just leaving the gift there since they were gonna go on a walk first
"ひいいいん" is written as hiiin so that's more of a sound effect, the other large text gave me stuff that made no sense together but i'd assume it's either 'delicious' or something specific to the food/area
if they check comments they'll see, if they don't then there's no point either way. Also, I'm totally fine if someone else explains it in the comments. Finishing the job