Lauren is a single woman in her thirties living in a London flat. She discovers that her attic operates as a magical portal supplying a continuous rotation of husbands. Content with her single life prior to this event, she soon focuses heavily on locating a perfect partner. She experiments with the alternate realities each new man brings, evaluating them based on their habits and social acceptability.

Bohai is a man who shares Lauren's experience of magically cycling through spouses. He travels between various homes and partners through portals involving electricity. He provides practical advice based on his extensive history with hundreds of past wives and husbands. He actively dislikes living in London and seeks an escape from the continuous shifts in his existence.

Carter is an American husband whom Lauren selects to accompany her to a social event. He works as a real estate agent in Denver in his alternate timeline. He displays a spontaneous kindness that draws Lauren's genuine affection. He possesses an easy-going demeanor that sets him apart from other prospects Lauren tests.

Toby lives next door to Lauren and serves as a steady presence in her rapidly changing life. He is polite and displays genuine concern for Lauren without prying into her unusual circumstances. Because he retains no memory of the displaced husbands, Lauren relies on his consistent neighborly friendship.

Natalie is Lauren’s sister and the co-owner of the London flat. She manages a busy schedule with her husband and young children. Lauren frequently contacts her to gauge her opinion on the newly arrived partners, using her as a baseline for reality.

Elena is Lauren’s best friend. She is busy preparing for her upcoming wedding and handles the stress with dark humor. She brushes off Lauren's early attempts to explain the magical properties of the attic, treating the claims as jokes.

Michael is an architect who appears as the very first magical husband. He attempts to comfort Lauren when she panics upon finding him inside her home. He maintains strict standards for household cleanliness and prepares excellent meals.

Maryam is a doctor who lives next door. She occasionally socializes with Lauren and adapts to the slightly altered realities introduced by the rotating spouses. She provides medical assistance when a severe accident occurs in Lauren's flat.

Jason is a gardener who arrives as an early spouse. He possesses extensive knowledge of plants and landscaping that influences Lauren's interests. He has a habit of chewing with his mouth open, which Lauren finds irritating.

Amos is Lauren’s real-life ex-boyfriend. He attends social events within her normal social circle and later emerges from the attic as an alternate-reality spouse. His appearance forces Lauren into frustrating legal and emotional situations.

Felix is a wealthy corporate officer who provides Lauren with a luxurious life. He owns a large country mansion complete with an indoor pool and conservatory. He is polite but formal and frequently travels for business.

Vardon is Felix's surly adolescent son. He goes by the nickname Mickey and routinely shoots an air gun outside his father's mansion. He treats Lauren with teenage indifference.

Zach is a popular and kindhearted man who shares a name aurally identical to a famous movie star. He sustains a spinal injury upon his arrival, requiring a hospital stay, codeine, and physical assistance. His affable nature endears him to Lauren's family.

Kieran is an early arrival from the attic. He argues briefly with Lauren about the towels and goes out for a run, prompting Lauren to test out the portal's mechanics using a Bluetooth speaker.

Ben is a man who comes with an established four-year marriage to Lauren. His arrival dramatically alters the existence of Lauren's extended family members, forcing her to rapidly reverse his presence.

Rohan is a quirky actor. He wears portions of his Elizabethan-era costume around the house and attends rehearsals during the day. He is charming but triggers Lauren's insecurities regarding neighborhood social dynamics.

Iain is a painter who arrives as a brief replacement spouse. He exhibits a constant tendency to complain, leading Lauren to quickly return him to the attic.

Gorcher is a man Lauren keeps briefly simply because he wears a suit. She decides his formal appearance makes him a socially acceptable date for Elena's upcoming wedding.

Taj is a friend introduced to Lauren's circle. She takes photos of Lauren and assists her with setting up dating profiles when Lauren briefly exits the marital cycle.

Laurel is a woman Bohai meets during his travels. She forms a strong bond with him and inspires his desire for a stable commitment. Her pregnancy secures his decision to stop cycling through spouses.

Adamm is a husband Lauren initially believes she might like. However, he quickly confesses to being involved in legal trouble related to his employment practices, prompting her to dismiss him.

Pete is a man Lauren briefly settles for out of pure exhaustion after losing Carter. She takes a nap rather than engage with him or reject him immediately.

Sam is a late arrival from the attic. He steps into Lauren's life just as she makes a permanent choice regarding the magical portal. She immediately tests him by sending him on an errand via text message.

Rob is Elena's husband. He attends pre-scheduled social dinners as he and Elena settle into their newly married life.