Mo-Ah, the daughter of a fresh fruit shaved ice shop, who always helps her father's shop every summer. She thought this summer would go by like any other— but the moment she sees the new part-timer her father brought in, all her expectations melt away like shaved ice. "You work here too, sister? You're awesome!" A playful voice, a face with a sly smile. The troublesome delinquent Park Si-Heon that she bumped into on the last day of school was right in front of her! The guy she hoped to never see again came in as a part-timer this summer. The two people who had a shaky start clashing every day at the shop— words colder than shaved ice and emotions hotter than the sun start to mix in the shop.