Abunai hôkago (1999)

A story of high school students. Ninomiya Kazunari and Shibutani Subaru act as genius student Katsuyuki and naughty student Haru respectively. Takagi Saya plays Katsuyuki's mother, while Kato Ai plays a girl loved by the genius student. When the mother introduces her new husband Sosuke (Iwaki Koichi) to Katsuyuki, Katsuyuki meets Sosuke's naughty son Haru (Shibutani Subaru.