Manami Tamura

As a longtime childhood friend and classmate of Kyousuke, this character shares a deeply rooted bond with him. Known for her surprisingly traditional and old-fashioned mindset, she often finds herself the target of Kyousuke’s teasing, earning her the playful nickname "grandma." She retaliates by calling him "grandpa" in return. Their close relationship is further highlighted by frequent study sessions held at her home, showcasing their enduring connection.