SUMMER (ODD YOUTH) 'Lee Eun Seo'

Who is Summer (ODD YOUTH)?

Summer (써머) is a South Korean singer under TOP Media and a member of the girl group ODD YOUTH. Her birth name is Lee Eun-seo (이은서), and she was born on September 23, 2007, making her 18 years old. She hails from Geosan-ri, Sinpyeong-myeon, Dangjin, Chungcheongnam-do, South Korea.

Summer was revealed as the second member of ODD YOUTH on September 20, 2024. The group officially debuted on November 1, 2024, with their single album "Best Friendz". As part of ODD YOUTH's identity system, Summer's representative color is red, and her representative emoji is the desert island symbol 🏝️.

Physically, Summer stands at a height of 167 cm (5 ft 6 in). Her MBTI personality type is ENTP, which aligns with her described playful personality. Born under the zodiac sign Libra and the Chinese zodiac sign Pig, Summer completed her education at Seojeong Elementary School, Shinpyeong Middle School, and Hanlim Multi Arts School, where she studied in the Department of Practical Dance. She graduated from Hanlim Multi Art School on January 8, 2026.

Summer's family consists of her parents, an older sister, and a younger sister. Her journey into performing arts began through her older sister's influence, who introduced her to dancing. While dancing became her primary passion, Summer only began taking singing lessons after joining TOP Media.

Summer's Career and Debut with ODD YOUTH

Pre-debut and Casting

Summer's path to becoming a performer began when TOP Media cast her during her 5th grade of elementary school. The casting opportunity presented significant challenges, inasmuch as she experienced fear regarding the frequent travel between her hometown of Dangjin and Seoul for training. After overcoming this initial apprehension, Summer committed fully to her journey, driven primarily by her passion for dancing. During her trainee period, she encountered difficulties adapting to the rigorous training environment. However, spending time with fellow trainees and agency staff provided crucial support that helped her navigate these challenges.

Official Debut as ODD YOUTH Member

TOP Media revealed Summer as the second member of ODD YOUTH through official SNS channels. The group comprises five members: Maika, Myah, Kanie, Summer, and Yeeum. ODD YOUTH debuted with the single album "Best Friendz", featuring the title track "THAT'S ME" alongside the brand single "Best Friendz". The debut concept emphasized authentic storytelling of youth who embrace their individuality, with each member contributing distinct personalities to create harmonious group chemistry.

Group Activities and Releases

Following their debut, ODD YOUTH released their first mini album "I Like You" in April 2025, followed by the second single album "Babyface" in March 2026. The group's discography showcases their commitment to themes of friendship and pursuing dreams through sincere musical narratives.

Summer's Profile and Background

Age and Birth Details

Lee Eun-seo's blood type is Type B. Her zodiac sign Libra and Chinese zodiac sign Pig reflect her September 2007 birth year classification.

Height and Physical Attributes

Summer's physical profile includes Type B blood classification, coupled with her documented stature in the K-pop industry.

Family and Education

Summer's parents are Lee Man-gyu, born in 1974, and Seo Mi-seon, born in 1978. Her younger sister was born in 2011, completing the family structure alongside her older sister. Her educational trajectory culminated in specializing in Practical Dance at Hanlim Entertainment Arts High School.

MBTI and Personal Traits

Summer's ENTP personality type manifests through her playful demeanor and bright, friendly character. She actively encourages individuals pursuing unconventional paths, advocating for perseverance through challenging moments and unfamiliar environments. Her philosophical outlook acknowledges that happiness varies daily, emphasizing patience for positive experiences to materialize. This perspective shapes her approach to both personal growth and professional development within the entertainment industry.

Summer's Personality and Interests

Visual and Stage Presence

ODD YOUTH recognizes Summer as a visual member within the group, frequently positioning her as center during their debut single. Her stage name reflects her refreshing appearance suited for summer aesthetics, particularly excelling in sleeveless outfits that earned her recognition as a "sleeveless goddess". Standing at 167cm, Summer possesses proportions characterized by elongated legs that contribute to favorable stage ratios. She demonstrates versatility in fashion, successfully executing challenging styles including crop tops, off-shoulder designs, and jeans combinations. During live performances in 2026, Summer exhibited stable vocals paired with relaxed expressions, maintaining solid execution through intense choreography.

Hobbies and Favorite Things

Summer relieves stress by socializing with friends, engaging in conversation, and relaxing, though she actively seeks additional stress management methods. Her preferred film genre remains horror movies. Her bucket list encompasses visiting a water park, taking countryside vacations, exploring markets, baking cakes, and spending rainy days at home making pancakes while watching horror films. She favors strawberry-flavored items, particularly strawberry cakes and strawberry lattes, and identifies winter as her preferred season.

Role Models and Inspirations

Lee Hyo-ri serves as Summer's role model, representing an unusual selection among fourth and fifth-generation idols who typically reference second and third-generation seniors.

Fancam Performances

Summer's individual performance videos document her stage executions, including fancams from various music broadcasts and festival appearances.