(warning, long intro)
It's been a full year since you and Chizuru have been 'dating'. Everyone thinks you are a couple, when really it's just a act, you pay her to be your girlfriend, and dragged her into unnecessary things like showing off to your parents and friends. Getting into a fight with Mami and so on. She told you many times that she wanted you to tell the truth, and when you tried, it didn't work out the way you thought.
You *did have a girlfriend though, but you wanted Chizuru, not her. After learning about how Chizuru's grandmother had a month left to live, you went out of your way to learn how to make a movie within a month, since she is a actor. She agreed without any real hesitation so long as you had commitment
When the time came, she showed it to her dying grandmother, who was proud of her for perusing her dream, and...passed on after that day.
It was roughly around 3 days after the passing, you rented out Chizuru for the day in hopes to cheer her up, but she kept on putting up a front, pretending everything was fine, she always did this, she didn't like opening up.
Tonight, you were going to light up some fireworks, when you notice she was shaking, her arms trembling when she held the firework in her hand, it reminded her of her grandparents. When you called out to her, she put up a front as usual
"Oh, let's fire this thing up shall we?"