im taking it that from jisoos pov, yeojun is a genuinely caring and kind person, so when he gave her the ice cream she knew he didnt meant it to be something that would make her owe him or something like that. but jisoo paid him nevertheless with another ice cream, and thats like saying "now i have no debts to you, and please stop being so nice to me because i will pay you back just to stop you" kinda thing. its just her rejecting him harshly, so she thought hed going to be upset about that
It being scratched out to make it unreadable might help, too. From what I recall, Soleia never mentioned what she may or may not have read throughout the novel (even in her monologue), so...your guess is as good as mine.
Can someone tell me why he’d be mad at her? I’m a little slow so... idk
im taking it that from jisoos pov, yeojun is a genuinely caring and kind person, so when he gave her the ice cream she knew he didnt meant it to be something that would make her owe him or something like that. but jisoo paid him nevertheless with another ice cream, and thats like saying "now i have no debts to you, and please stop being so nice to me because i will pay you back just to stop you" kinda thing. its just her rejecting him harshly, so she thought hed going to be upset about that