Saijou Touji

In ~Touji Hen~
The distinguished son of the president of a certain major corporation. Always cool, calm and collected, he's regarded as a competent son and heir with a promising future. Before meeting the protagonist, he was as cold as ice with no interest in anybody. However, he fell for her at first sight and a mad, twisted love for awoken. He gradually becomes madder and madder as his twisted love for her grows deeper.