Shotaro Hori
Kyouko's younger brother. With their parents rarely around due to work, Kyouko's been the main parental figure in his life since he was a kid—so he naturally sees her as a motherly presence.
Early in the story, Izumi finds him collapsed on the street and brings him back to the Hori house. That single act of kindness pretty much seals the deal for Shotaro. From then on, he's basically attached himself to Izumi, treating him like a non-blood-related older brother and showing him a lot of affection.
Content compiled by AnimeList.moe from publicly available sources.
