Gah, he's being such a cutie-patootie. (He's not her cousin, is he? I can't remember anymore... Ah, but different times and all that.)
I have a feeling he's been positioned as one of her future love interests, alongside Yayul.
I do wonder if/when the pivotal moment will come about where she stops seeing them as kids and herself as an adult. Maybe after a timeskip into older teenagehood.
Thanks for the chapter!