As Bo Burnham Once Said: Prolonged Eye Contact - Tumblr Posts

Moonjo and Jongwoo are so funny about eye contact because Jongwoo WILL NOT make eye contact for more than 5 seconds. Do NOT look him in the eyes, do not look in his direction, look everywhere else. Meanwhile Moonjo will not blink. Moonjo will not look away. Moonjo is a man with a purpose and that purpose is having Jongwoo in his field of vision 24/7.

Also: I may be wrong but Jongwoo's eyes stop moving around and focus a lot more towards the last episodes (which makes sense considering he's realized that Moonjo's a mega creep and if he isn't keeping an eye on him then who knows what he'll do)