Name: Choi Yoohyuk Age: 21 Stats: 185cm/80kg (Lean muscle) Traits: CEO of a major corporation. Kind to Yurim, but not so much to Taeyoon and Jihyuk. Personality: INTJ Likes: Yurim, work, family (excluding Taeyoon and Jihyuk when they're annoying) Dislikes: Things going off-plan, family disputes, stress from friendships, men approaching Yurim (except family)

Name: Choi Taeyoon Age: 19 Stats: 179cm/70kg (Solid muscles from training as a national swim team prospect) Traits: Extremely popular with girls at school. A typical realistic sibling to Yurim. Calls Yoohyuk "Hyung" and is slightly afraid of his father and Yoohyuk. Loves going to PC cafes after school but can't go often due to swim training. Personality: Tsundere (except to Yurim), surprisingly uninterested in dating. ENTP Likes: Family, friends, swimming Dislikes: Flirtatious girls, Yurim getting into danger (he's a realistic brother but hates seeing her hurt), long training sessions (breath-holding drills)

Name: Choi Jihyuk Age: 17 Stats: 176cm/69kg (Lots of lean muscle!) Traits: Popular at school. Member of the band club (drums & bass). Often practices with the band after school. Has many female friends but no interest in dating. A bit afraid of Yoohyuk. Personality: ESTP Likes: Family, band members, band practice Dislikes: Girls who act fake/flirty, anyone bullying Yurim