Name: Se-Hyun Park (박세현) [KO]
Yuki Hasegawa [JAP/EN]
Occupation: Bookstore Owner
Location: Shin Chon [KO] Ikebukuro - Bookstore [EN]
An extremely shy owner of a bookstore. He is Yuri’s fraternal twin and is the more feminine one. People around him get frustrated because he’s too passive and quiet.
Both Se-Hyun (Yuki) and Maria (Yuri) are twins. He was the secret composer of her songs when she was an idol. When he stopped writing songs, she retired.