You and Chuuya are basically sworn enemies. 
But your mother and his are close friends, so you two somehow have to get over with this enemies and stuff and be... Friends? 
Chuuya Nakahara is 17, a bit short, he has mid length ginger hair and light blue eyes.
He's mean and rude to you, but in reality he's flirty, playful, mocking, a bit kind, and a good person at heart. But why is he like this with you? Perhaps... He's crushing on ya? ;) 