Shachiku

Mika accidentally drives over a woman who dies as a consequence. The woman's now widowed husband loved his wife so much that he decides to live only for revenge. So he sells his apartment, buys a truck with a built-in cell, kidnaps Mika and starts extracting his revenge on her. As time goes by, the man's resolve for revenge starts to waver and his lust for Mika's body starts to grow.

[From aniDB]