The Perfect Alpha For Tom (слэш)

Prompt: Tom Riddle has always been ambitious. Despite being an omega, he earned himself a good position in the ministry. He couldn't care less that people talk shit about him behind his back. He'll show them all that he doesn't need an alpha to be powerful and successful.
Everything goes according to plan until one day, through circumstances out of his control, Tom finds himself in an elevator with Minister for Magic Harry Potter, just as he is about to go into heat.