
Hasn't Eunchae just started high school and Jaemin is in uni? I'm pretty sure she was a middleschooler when the whole ordeal with her older brother went down. I would've found it extremely weird if they dated, Jaemin never saw her that way either and she's so young. This feels much more natural imo.

i found the situation where pureum just suddenly became in the friend group so funny and cute at the same time, and also it kinda resembles her personality too! you know what she’s like, kinda air headed sometimes and like in her own world, but she’s still cute hasjjsjsjs its cute that all of them kinda accepted her to be in the group lol, pureum just built that way XD

The timeline can be adjusted to a different setting of their life it doesn't have to be limited to where Eunchae just started highschool and Jaemin in uni. Jaemin did see her that way, even if its just a small gesture it was highlighted in a panel that he did infact secretly blush when Eunchae confessed to him last season and with her being young that blush and emotion from him can be also a wholesome admiration of her which can lead to a different kind of affection later on. So no it doesn't really feel natural with that scene in mind being dropped off and turned 180° in this season.

Yes if you view it that way then its fine, we can have different opinions. Its just that if you think about it in the storytelling aspect it just comes of as lazy writing of a new character heavily on making it the main female character in that light. That's why her build up and character was designed as that way to make it convenient with making relationships with other characters and insert herself to the narrative which solidifies the argument that it comes off as unnatural and shiftless way of introducing a character right off the bat.

It's clearly set up to Eunchae merely admiring him and mistaking this for love, or having a puppy love, like a young girl crushing on her brother's best friend type of deal. Forcing actual romance on that is way more unnatural and kind of weird, considering the age difference and the completely different stages of life they're in. I'm personally very glad the author didn't go that direction and I still disagree that Jaemin has ever seen her as a woman in that way.

Clearly you're ignoring my possible given scenarios with them still pushing about the gap when I particularly said it can be a catalyst for the break up and dismissing the fact that the setting can be adjusted. You are a Eunchae hater the way you're rejecting the fact that the author made Jaemin blushed because of her and the way you minimize Eunchae's feelings when she literally still love Jaemin and cried her heart out last chapter. You don't have to be too pressed about it because it wouldn't matter anyway.
This season felt more fulfilling with the friend group's bond with each other. I just felt like it would've been more interesting if Eunchae and Jaemin got together in the first few chapters and broke it off because of the gap and differences leading to meeting pureum which would've cause a lot more angst and story flow coming together because it looked like pureum was just slapped into the friend group and the cafe for the convenience of adding a new character out of nowhere especially being the female lead too, maybe that's why it just doesn't seem so natural.