He waited till it rained.

It was a routine for her to gaze at stars till falling asleep. Twinkling stars always inspired her to dream. But, that day felt different. The sky was full of dark thundering clouds, just like they are waiting for some announcement to be made. She stood up to close the windows when few knocks on the door caught her attention. Wondering who could it be at this late hour, she opened it.
Beers and pizza boxes in one hand and balloons in another, he was here. Happy birthday he said, with a wink and hug. Little did she know, someday someone would remind her, her own birthday. The Petrichor pulled them towards the window. It was melodious without music, fragrant without scent.
'I can smell the coffee ', she said and turned around to see him standing with two coffee mugs. 'Sorry, I didn't realize, I kept dwelling so long.‘She said. He replied with a smile. They continued staring at the pleasant weather while holding hands.
For the first time, they experienced telepathy. She felt complete like never before. Thundering didn't scare her; rather she loved the sound of it. And on the other side even though thundering scared him, He was confident of his thoughts; he knew what to do next; knelt down and took the ring out. She saw glitter in his eyes what she used to adore in the sky, and he felt the thunder in her heart beats and tiny rain drops flowing from the corner of her eyes.
                                                         

And cut. Everyone was clapping and hooting.

 The director said, “This is the perfect ending to the film, it is going to be a hit. The writer did his job pretty well.”

Whereas the writer was in hurry to leave, it was cloudy and might rain. He needed to buy the ring. Obviously, the plot he wrote for his girl has to come alive today.