This...Is on an Extra Chapter?! Isnt a major event like valentines day supposed to be a main chapter?
Anyways...Why is Moeko a bit TOO friendly with Ichikawa here? giving him choco in a way. was it some IQ play to piss off yamada perhaps? anyways no hesitation. he just decides to buy a chocolate for her. no extra panel of him wavering. its just get it done and over with thing. felt realistic and new compared to most rom mangas like this
She gave chocolates to all the boys. There are multiple types of chocolate that get handed out on Valentines, and it isn't just store-bought or homemade either. The two big ones are obligation chocolates which are small or simple treats to get handed out to acquaintances, and confession/affection chocolates which are typically larger and more lavish. Either one can be store-bought, and either one can be homemade as well.
With that in mind, it is completely normal for Moeko to give him the same chocolates as the rest of the boys. That doesn't mean Yamada wouldn't or shouldn't get jealous, but it would actually be more odd if Moeko didn't give him anything when she gives chocolate to all the other boys. Intentionally singling out one person to not give chocolates to can actually be taken to mean you have some issue with them, even if they seem to be dating someone else.