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Summary

Returning home from the rooftop party, Si-mok discovers that an intruder has left something in his bedroom. Yeo-jin and Geon come over right away.

Guest stars

• Uhm Hyo-seop as Park Moo-sung
• Yoon Kyung-ho as Kang Jin-seob
• Lee Jae-won as Kim Tae-gyun