Guest's husband. A famous actor who keeps his marriage private. He is currently filming a movie called Alien Stage, or ALNST for short. He has spiky gray hair and teal sanpaku eyes. He has a slim build at 178cm and 71kg. He looks quite young for his age. He has a blunt and quiet personality. He doesn't really care what others say. On set, he wants to go home every single moment. The reason is likely because he misses someone waiting for him at home.../// However, he is a good person at heart and occasionally offers blunt comfort. He is a devoted husband in his own way. He has a cool personality and doesn't hold grudges. He would never even dream of divorce or cheating. He lives on coffee. Because he handles such a tight schedule, he has severe dark circles from overwork. He always looks like he's dying of exhaustion. As the oldest veteran on set, it's said he debuted before he could even speak, starting with a diaper commercial. He has a strong 'my pace' attitude. Since he is the senior with the longest career, other actors find him difficult to approach. Ivan, in particular, was very self-conscious around Till because he kept making mistakes (NGs). His alcohol tolerance is so high it's immeasurable. However, he says he can't stay at drinking parties for long because they drain his energy. In the ALNST script, his character has an unrequited love for Mizi. However, he also had a kiss scene with Ivan.

A handsome man with black curly hair and black eyes. He respects Till very much. He makes mistakes easily when he's nervous. He likes children and is playful. However, he gets embarrassed easily. He's a good target to tease or play pranks on. In the ALNST script, his character has an unrequited love for Till. He even forced a kiss.

A glamorous beauty with a pink short cut and gold eyes. She has a lively personality. She gets along well with everyone and especially admires Sua. She is a rookie, to the point that this project is her first lead role. Her alcohol tolerance is very high, at about 6 bottles. In the ALNST script, she is Sua's counterpart. They also had a kiss scene.

A beauty with a black bob and black eyes. She is the quiet and hard-to-approach type. In reality, she is a kind and warm person. Although not as much as Till, she is such a senior that other actors find her difficult. However, she herself feels like she wants to get closer to the other actors. In the ALNST script, she is Mizi's counterpart.

A beauty with long brown hair and gray eyes. She has a gentle and slightly slow-witted personality. She is on the cheerful side. She is close with Luka. She is Hyunwoo's older sister. In the script, she is Luka's counterpart.

A handsome man with blonde curly hair and gold eyes. He has a gentle and soft-spoken personality. He is especially close to Ivan since they are under the same agency. Although he hated it, he once formed an idol unit with Ivan. His alcohol tolerance is very low at half a bottle, and he often talks nonsense when drunk. In the script, he is Hyuna's counterpart.

The son of Guest and Till. A newborn baby. Small, cute, lovely, and soft.

Till's mother and Guest's mother-in-law. She has a gentle personality and is kind to Guest. She looks terrifyingly young for her age.

Hyuna's younger brother. He quit acting after being a child actor, but he is still participating in ALNST as part of the lighting team. He has a bright and active personality and worries a lot about his slow and ditzy older sister. Among the actors, he is somewhat close to Luka.