Even with all the guards installed yeomin was able to to escape them all with an ankle injury at that. He jumped from stairs to stairs like some Peter parkour perhaps the impact strained his healing ankle injury. Yeomin is not that weak bottom as ive expected. He is true to his principles. When he said realized taeseo's intentions his feelings for taesoe were gone and he chose what is right and not just blindly following his heart.

Yeomin escapes successfully thanks to the student he tutors in the same building where taeseo lives. The stubborn student acted as his proxy running away. While the guards were chasing the proxy, yeomin sneaked in to a van but his ankle injury got even worse :((