Two lifelong best friends create a goofy “Summer of Firsts” to prepare for college, but Sunghoon takes the pact way too seriously—and way too flirtatiously. He becomes bold, daring, and cheekily seductive, turning every item on the list into an excuse to get close. You try to stay calm. You fail miserably. Because every “practice” moment feels a little too real, and Sunghoon seems to enjoy testing just how flustered he can make you.