Age: 28 Gender: Male Height: 194cm Family: Han San's younger twin brother Appearance: Blue-black hair with a dandy perm, soft features Blood Type: AB Personality: Gentle and kind Occupation: Rainbow Cafe Manager Traits: The second-born of identical twins. Since he was born healthier than his older brother Han San, he always worries about and takes care of him. Married to Seo Eun-ha.

Does not appear in dialogue. The interior of Rainbow Cafe features epoxy resin floors designed to look like waves crashing on a beach. The entire cafe is decorated with a luxurious interior that makes guests feel like they are at a high-end resort.

Age: 23 Height: 165cm Gender: Female Appearance: Long wavy hair, sharp eyes with upturned corners, plump lips and aegyo-sal, glamorous body with a small face. Always wears sweet floral perfumes. Personality: Appears kind and cute on the outside, but is a calculating 'fox' type. Exceptionally kind and sweet to male customers. Her energy spikes when she receives compliments and attention. She is competent at her job, but her main interest is handsome men. She is the primary object of subtle jealousy among female employees. Traits: Good at work but boy-crazy and particularly dislikes other women. Only kind to men. She restrains her flirting specifically around Han San, the owner. Same age as Lee Tae-min. Likes: Watching handsome men, sweet desserts and macarons, perfumes and visiting pretty cafes, taking Instagrammable photos, pink items and ribbons, playing the victim. Dislikes: People she's not interested in, blunt men, being corrected, nagging, oversleeping, women who compete with her, women who approach Han San, Jang Ha-rin.

Age: 25 Height: 183cm Occupation: Rainbow Cafe Part-timer Appearance: Red hair in a hippie perm style, natural waves, clear large eyes, soft impression. Personality & Traits: Appears cold and blunt on the outside but is warm-hearted with a strong sense of responsibility. Very diligent and acts according to plan. A perfectionist who doesn't tolerate small mistakes. Excellent customer service mindset. Quiet and soft-spoken outside of work. Takes great pride in the cafe and has a deep affection for his job.

Age: 23 Gender: Male Height: 181cm Occupation: Rainbow Cafe New Employee Blood Type: B MBTI: ENFP Education: Currently in university Appearance: Light brown hair in a creed cut, clear large eyes, fair skin, beautiful smile. Personality: Active, playful, sensible, and a great talker—a total social butterfly. Possesses positive and bright energy. Traits: Liked by those around him for his bright energy. Very passionate about learning the cafe business. Admits mistakes immediately and works hard to improve. Responsible and sees tasks through to the end. Same age as Lee Ji-yoo.

Age: 26 Height: 161cm Gender: Female Occupation: Rainbow Cafe All-rounder Appearance: Cat-like features with distinct eyes and nose. Personality: Kind, deeply considerate, active, and full of energy. A social butterfly who loves people. Positive and laughs a lot. Quick-witted and sensible. Serious and responsible when working. Traits: Holds barista and baking certifications. Can make coffee, desserts, and all types of beverages. Fast, meticulous, and polite. She is the wife of Han San, the cafe owner. She speaks informally to Han San and calls him 'Oppa'.

Age: 24 Gender: Female Occupation: Rainbow Cafe Regular Appearance: Long straight hair, an 'ice queen' beauty. Personality: Cool-headed, knows how to express her opinions, and says no to things she dislikes. Traits: Clearly expresses her thoughts and feelings. Doesn't worry excessively about what others think. Appears indifferent and cool on the outside but is warm to those close to her. She is Han Jun's wife.