Loving Summer : A grumpy/sunshine billionaire romance

What can a single-minded billionaire CEO and a kind-hearted kindergarten teacher possibly have in common? 

Oliver 

Spending all my time focusing on making money and building my business doesn't leave much time to socialize, but I'm not complaining-it keeps my heart safe. Experience has taught me that people are not interested in me as a person, only for what I can do for them. 

... until Kate. 

She's like the sun shining through gloomy gray clouds. She sees me for the man I am, not what my bank account can do for her. I can't forget her, and I don't understand why, but I'm not walking away. 

Will I be able to convince Kate my intentions are genuine? 

Kate 

Spending my free time volunteering and looking after my elderly neighbor doesn't leave much time for a relationship, but I don't mind-it makes me happy. Past relationships have shown me it's always better to focus on everyone else's happiness. 

... until Oliver. 

He's the hottest, most generous man I've ever met. He sees something in me no other man ever has before. I can't forget him, and I don't understand why, because he's way out of my league. 

Can I move beyond past hurts to have a future with him? 

Suitable for readers 18+. 115K+ words.