https://theblank.net/manga/runners-high/

Summary:
Lee Jeong-hyeok enters the Department of Physical Education at Lejin University as a track and field special student. His goal is to graduate with diligence and become a physical education teacher. Following his routine, he heads out to the field the day after a training session. However, things take an interesting turn when his classmate Yoo So-ra appears. Despite having just finished her own training, something even most men would struggle with, So-ra continues to run ahead, piquing Jeong-hyeok’s curiosity. The problem is, So-ra misinterprets his gaze, thinking he’s staring at her chest. But that’s just the beginning… While drunk, the famous 100-meter racer and influencer, Im Yoo-ju, unexpectedly asks Jeong-hyeok a personal question. To make matters worse, a sports massage therapist secretly rubs her genitals on Jeong-hyeok’s hand in an attempt to suppress her sexual urges. Amidst these strange and heated situations, Jeong-hyeok must navigate through them while striving to stay on track for his graduation. Will he be able to make it through without losing his focus?