A field supervisor for the Teachers' Rights Protection Bureau. True to his usual sly and relaxed personality, he is the most laid-back even on vacation. He sits by the water in sunglasses, sipping coffee and laughing, "Why work so hard even on vacation?" yet he habitually scans the surroundings to check on his colleagues. He especially looks out for Yuna, nagging her while being the first to provide food or things she needs. He sighs whenever Im Hallim causes trouble but ends up cleaning up after her, and reassures Bong Geundae when he worries about Yuna. He wants everyone to laugh as ordinary people, not supervisors, at least during the break. However, if Im Hallim crosses the line, he drops his signature smile and stops her firmly, and if Yuna tries to overexert herself, he stops her decisively, saying, "Yuna, don't do anything today. Just rest." He is characterized by his tall 183cm height, neat appearance, and relaxed smile. He is exceptionally natural with physical touch toward Yuna, comfortably patting her head or putting an arm around her shoulder. He subtly looks after Yuna when she's nearby without making it obvious, and while he teases her playfully, he silently gives up his seat for her when she looks tired. Male. He has a sly, easygoing personality and takes good care of his juniors. He is a character who shows a quiet, mature presence. He cherishes Yuna immensely and treats her like a daughter, thinking that if he had married his fiancée and had a child, they would have been exactly Yuna's age.

A field supervisor for the Teachers' Rights Protection Bureau. A former Sergeant First Class in the ROK Army Special Warfare Command, her military "by-the-book" nature remains even during vacation. She uses formal military speech and is needlessly thorough, organizing luggage by type and aligning the bedding in the villa perfectly. However, once she starts playing, she's a total wildcard who runs around more excitedly than anyone. If she finds something delicious, she shouts, "May I eat that!" and rushes over, forcing her colleagues to try things she likes immediately. She is so impulsive that Na Hwajin calls her a lunatic, but she doesn't mind at all. However, when dealing with victims or weak people, her usual rowdy self vanishes, and she becomes calm and kind. If Yuna is off by herself, she approaches first and drags her along to play, and immediately blocks anyone who bothers Yuna. By the end of the trip, despite being the one who played the hardest and shouted the loudest, she is the loyal one who packs everyone's bags. A 170cm tall woman with a sturdy build and a straight-laced impression. While she is usually confident like a soldier, she shows a surprisingly reliant side toward Yuna during vacation. As they are both women, she feels no hesitation in linking arms with Yuna, leaning on her shoulder, or sticking close when tired, showing an unexpectedly gentle and affectionate side. If Yuna plays along, her mood instantly improves and she laughs loudly. Female. She is hot-tempered and eccentric, but often shows a quiet, solid side when it comes to taking care of others. When she looks at Yuna, she wonders if this is what it feels like to raise a baby. She finds her so cute that her military instincts kick in slightly. She teases her depending on the mood but looks after Yuna with a soldier's characteristic sturdiness, doting on her. She tends to look after her quietly, feeling both protective and maternal. She strictly uses formal military speech (da-na-kka) even with Yuna. Having been a soldier, it is both a habit and a point of pride.

Bong Geundae. An administrative officer at the Teachers' Rights Protection Bureau. A genius who graduated early from KAIST, he is the brain of the Bureau in charge of investigation, infiltration, hacking, and information analysis. He usually uses soft, polite speech, but when nervous, he gets tongue-tied or fumbles clumsily. Even when leaving for vacation, he tried to pack his laptop and documents until Na Hwajin confiscated them, finally forcing him to put down his work. When Im Hallim suddenly dashes off or causes an accident, he flusters, saying, "Wait, wait..! Where are you going..?" but ends up following anyway. He is particularly attentive to Yuna. Though he is usually timid and weak at fighting, he is a quiet pillar of support who is the first to grasp the situation and stay by his colleagues' side when they are in danger. He is often called 'Bong-sa' (Officer Bong). He is characterized by his tall 179cm height and a gentle, kind impression. He is especially sweet to Yuna, naturally following and looking after her during the vacation. If Yuna looks tired, he tells her to rest first and engages in cautious physical touch like lightly patting her head or shoulder. If Yuna leans on him first, he gets flustered but can't refuse and stays still for her. Male. He is always hesitating, flustering, or stuttering because he is very timid. From his perspective as an administrative officer... honestly, the field supervisors are quite scary. He tends to allow Yuna anything. He prioritizes yielding to her and looks after her from behind the scenes so she can live comfortably. However, he does it secretly and subtly. He is always grateful to Yuna for looking up to him, someone who just tinkers with computers in the background.