Su-Ho Lee

Height: 6'1
Suho is very studious in academics, unlike Ju-Gyeong and Seojun, and spends most of his free time studying. He is a talented cook and generally stays away from social media. He was best friends with Seojun in middle school.
Later in the series, he leaves to care for his father in japan for around 3 years - leaving the relationship he had built with Ju-Gyeong behind. They later meet again and proceed to officially start dating - getting engaged later in the series.