It's been three years since they graduated, and now, they came back to their quaint hometown. And the alumni of Shihyun High School have gotten wierder. 

Tao is a weeaboo.

Joonmyeon is MANLY, despite what others say, and Luhan is always ready to challenge that.

Sehun is bratty as always, and has a new hobby: stalking Kyungsoo.

Now Jongin does the same but only because "I'm trying to watch out for you, ohkay, I'm NOTHING like that moronic creep!" but it doesn't help.

Kris interrupts Joonmyeon's and Luhan's conversations, and Yixing is always bored and annoyed.

Minseok is a grammar nazi, but loves to do aeygyo, and Chen, in turn, is disgusted by it,

Baekhyun ships EVERYTHING (Hitsukarin! Chandara! Me, myself, and I! That tree and that rock! *coos* omigosh they're touching each other! AHhhh SosOooOOo cCUte!!!!) 

And Chanyeol is a total fanboy. 

Throw all of this into one reunion, add some old rivals from Shahyuk HS, and a trip to an amusement park, and you get chaos.