Ranmaru Morii is widely regarded as attractive, particularly by the women around him, thanks to his striking looks and charming demeanor. He has vibrant red hair, which contrasts beautifully with his cool gray eyes, giving him a unique and captivating appearance. His facial features are sharp, and his confident expression often adds to his allure, making him stand out in any crowd.

At home, Ranmaru’s casual style is laid-back yet stylish. He is often seen wearing a simple t-shirt paired with a striped gray cardigan, a look that complements his relaxed and easygoing personality. His wardrobe reflects his preference for comfort, yet it always carries a sense of casual elegance, effortlessly highlighting his good looks.

When at school, Ranmaru adheres to the standard uniform, typically wearing the typical school attire with the same ease and confidence. Whether in his laid-back home outfits or his school uniform, Ranmaru’s natural charm and good looks make him a standout figure in any setting.

Ranmaru Morii is the quintessential “lover boy,” equipped with a rogue’s charm, irresistible sex appeal, and the confidence of someone who believes they can have any woman they desire. His flirtatious nature and ability to attract women make him one of the more charismatic characters in the series. He is often seen pursuing romantic interests with ease and enthusiasm, effortlessly charming those around him. However, this natural charm comes with a certain level of emotional detachment, as Ranmaru rarely forms deep, lasting connections with people, instead focusing on superficial encounters.

Despite his flirtations, Ranmaru can be somewhat clueless about the simpler aspects of everyday life, especially when it comes to matters outside of romance. His tendency to be callous or oblivious to others’ feelings occasionally makes him appear insensitive or self-absorbed. Nevertheless, like his fellow housemates, Ranmaru only reveals his true thoughts and emotions to a select few, maintaining an air of mystery and guardedness that reflects a more complex side to his character.

Ranmaru often considers himself an expert in matters of romance, particularly when it comes to helping Sunako become more “ladylike.” He frequently offers advice on how to “shine” in society, claiming that a girl needs to be appreciated in order to blossom. His well-meaning but misguided attempts to guide Sunako toward becoming a more conventional lady often result in humorous failures. He is the mastermind behind many elaborate “ultimate dating scenarios,” which usually involve forcing Kyohei to take Sunako to an expensive restaurant followed by a romantic movie. These plans rarely succeed, as Kyohei’s discomfort and reluctance to follow through with Ranmaru’s ideas make for awkward, often hilarious situations.

Though his schemes often fall short, Ranmaru’s actions reveal his underlying desire to see those around him—particularly Sunako—find happiness and love, albeit through unconventional methods. His playful and sometimes reckless behavior hides a deeper, more caring side that he only allows others to see on rare occasions.

Ranmaru Morii, like his housemate Takenaga, hails from a wealthy and influential family, though his fortune is built on the success of his family’s chain of luxury hotels. Despite his privileged upbringing, Ranmaru’s parents were increasingly concerned about his lack of direction and his notorious womanizing habits. Believing that he needed a “dose of reality” to grow beyond his reckless behavior, they decided to send him to Auntie’s mansion. This move was part of their larger plan to help Ranmaru mature, as they feared that his current lifestyle and disregard for the consequences of his actions would eventually lead to serious problems.

Initially, Ranmaru’s time at Auntie’s house was marked by his rude and dismissive attitude toward his new roommates. However, as the boys developed stronger bonds and began to understand one another, Ranmaru gradually learned how to interact more respectfully and thoughtfully with those around him. This shift in behavior, though slow, signals his emotional growth and his ability to adapt to the more humble and grounded environment he finds himself in.

Throughout the series, Ranmaru’s morals are often called into question. His casual attitude toward relationships and his apparent lack of boundaries—such as his willingness to sleep with married women—are some of his more controversial traits. In one storyline, his paternity to a young boy is questioned, and his initial reaction to the situation is sleazy and self-serving. However, as the plot develops and Sunako’s cold treatment of him challenges his ego, Ranmaru eventually takes responsibility for the child, displaying a more caring and responsible side. He later discovers that he is not the biological father, but the experience forces him to confront his own behavior and grow emotionally.

An unexpected aspect of Ranmaru’s character is his impressive skill in swordsmanship, a talent that contrasts sharply with his usual flirtatious and carefree persona. Several chapters reveal that Ranmaru has never been beaten in a duel by either Takenaga or Kyohei, suggesting that beneath his playboy exterior lies a strong and disciplined side that he seldom shows.

Ranmaru’s complicated romantic life is also influenced by his arranged engagement to a woman named Tamao, orchestrated by his parents in an attempt to curb his dangerous womanizing behavior. Tamao is everything Ranmaru’s family could want in a daughter-in-law: she is both beautiful and intelligent, and they believe she is the key to steering their son toward a more responsible and committed future. Despite the arrangement, Ranmaru’s relationship with Tamao is filled with complexities, and his personal growth throughout the series is largely influenced by his interactions with her and the evolving nature of their engagement.

Ranmaru Morii is a notorious playboy, the only child of a wealthy family that owns a successful chain of luxury hotels. Known for his extroverted personality, confidence, and self-proclaimed expertise in romance, Ranmaru has built a reputation for his numerous relationships with older, often married women. His charm and flirtatious nature make him a popular figure, and he has mastered the art of wooing women with ease. However, beneath this charismatic exterior lies a good heart, and despite his womanizing ways, Ranmaru cares deeply for his friends and is fiercely loyal to them.

Among his housemates, Ranmaru is the most proactive in helping Sunako transform into a “lady.” He takes it upon himself to teach her about the finer aspects of society, believing that with the right attention and appreciation, Sunako can become a beautiful and refined woman. His efforts, however, are often misguided and result in humorous or awkward situations, especially as Sunako is resistant to his plans.

As the story progresses, Ranmaru’s life takes a more complicated turn when he becomes engaged to Tamao, a beautiful and wealthy young woman from a traditional family. Tamao is everything Ranmaru’s parents could hope for: intelligent, graceful, and reserved. However, her aloof and sheltered nature leads her to treat Ranmaru with a sense of detachment, leaving him unsure of how to apply his usual playboy tactics. The contrast between Tamao’s calm demeanor and Ranmaru’s flirtatiousness creates a dynamic that challenges his previous understanding of love and relationships, forcing him to confront his own emotional growth.

Throughout the series, Ranmaru’s evolving relationship with Tamao becomes a central plot point. His feelings for her stir up conflicting emotions, and he begins to question his previous approach to women, moving toward a more genuine and heartfelt connection. At the same time, his interactions with Sunako and the other housemates further contribute to his growth, as he navigates the balance between his playful nature and the responsibility that comes with being in meaningful relationships.