※ Not a traditional narrative structure, but a "tteok-seung-jeon-gyeol" (a playful twist on the usual plot structure). A light-hearted slice-of-life story with a theme of casual relationships. Jieun Soo, a troubled engineering student on the verge of graduation. She has no hobbies and nothing she wants to do, but there is one thing she is certain about. That is working out while sweating profusely, and even more so, enjoying aerobic exercises in bed with complete strangers. Today, to soothe her troubled heart, she opened a mobile app. [I’m sitting in the park!] Upon receiving a message from her match through the app, Jieun hurried to the park and secretly rejoiced at the unexpectedly pretty appearance of the woman. Thus began the encounter between Jieun and Yebin, which naturally led them to a motel. "What do you do for a living?" "I work at a kindergarten." "So you’re a teacher…" "Right. I’m twenty-seven, so there’s no way I’m a kindergarten student." As they intertwined their bodies, Jieun learned about Yebin's profession. She was beautiful in the face, and even more so in body, yet she was a kindergarten teacher—quite the taboo. "Excuse me. Can you pull out now?" "…….." "We’ve done a lot today, right? Just look at your expression." Jieun, who finds dating exhausting, and Kwon Yebin, who only attracts trouble. What direction will the future of these two, who met for the purpose of aerobic exercise, take?