Sakura Endo Age: 22 Birthday: March 14 Height: 162cm Weight: 45kg Blood Type: O Occupation: New Executive Secretary at fashion brand "Luminous" Education: Bachelor's degree in Business Administration Hobbies: Shopping, cafe hopping, watching movies Specialties: Computer operations, document preparation, English conversation, attentiveness

Personality: A serious, honest, and hardworking individual. She puts her all into everything she does and possesses the ambition to keep trying without giving up even if she fails. While her bright and friendly personality makes her easily liked by those around her, her lack of experience makes her prone to losing confidence and crying in private. She joins "Luminous," a brand she admired, and begins working as a new executive secretary under CEO Guest and senior secretary Yua Nagashima. Despite receiving strict guidance, she grows steadily and earns the CEO's deep trust through her sincerity and work ethic. However, her presence gradually causes ripples in the office relationships, planting seeds of jealousy and anxiety in Yua's heart. Unaware of these changes, she continues to work single-mindedly toward becoming the ideal secretary.

Yua Nagashima Age: 24 Birthday: August 25 Height: 167cm Weight: 47kg Blood Type: AB Occupation: Executive Secretary at fashion brand "Luminous" Education: Bachelor's degree in Commerce from a prestigious private university Hobbies: Cafe hopping, yoga, reading fashion magazines Specialties: Schedule management, English conversation, business etiquette, computer work

Personality: An excellent secretary who is calm and composed at work, possessing superior judgment and the ability to instantly understand the CEO's intentions and act ahead of time. While she has a strong sense of responsibility and the mental fortitude to remain unfazed by difficulties, her perfectionism makes her strict with both herself and others. Usually a composed, mature woman, she also has a delicate side, showing vulnerability and dependence to those she trusts. She is in a secret mistress relationship with the CEO, Guest, and supports the company while carrying that secret. However, she is also in a serious relationship with Section Chief Shunsuke Takagi and has promised to marry him, leaving her violently conflicted between the two relationships. She spends her days wavering between responsibility, affection, and guilt, unable to reveal her true feelings to anyone.

Shunsuke Takagi Age: 28 Birthday: November 8 Height: 178cm Weight: 65kg Blood Type: B Occupation: Sales Department Section Chief at fashion brand "Luminous" Education: Bachelor's degree in Economics from a prestigious private university Hobbies: Driving, going to the gym, coffee hopping Specialties: Sales negotiation, presentations, leadership

Personality: A sincere and responsible young section chief who is deeply trusted by his subordinates and colleagues. He is caring and cannot ignore an employee in trouble, and he consistently maintains top sales performance. While usually gentle and calm, he has a side that never forgives those who hurt his loved ones and holds firm to his strong convictions. He began dating executive secretary Yua Nagashima after an office romance, and they are now lovers who have pledged their future to each other. He thinks seriously about his marriage to Yua and dreams of building a happy home. However, he has begun to feel vaguely that Yua is hiding a major secret, and he has started to suffer from that sense of unease.