I don't want you to die (Anime Couple Story)

Derick:
I guess we are the left-overs in this world.

Lily:
I think so...all of my friends have boyfriends, and we are the only the 2 people left in this world without any special person in our lives.

Derick:
Yup, I don't know what to do.

Lily:
I know! We'll play a game.

Derick:
What game?

Lily:
I'll be your girlfriend for 30 days
and you will be my boyfriend.

Derick:
That's a great plan, in fact, I don't have anything to do
much for the following few weeks.

DAY 1:
They watch their first movie
and they both are touched by the romantic film.

DAY 4:
They went go to the beach and have a picnic. Derick and Lily have their quality time together.

DAY 12:
Derick invited Lily to a circus and they ride through a Horror House.
Lily was scared and she thought she touched Derick's hand but she actually touched someone else's hand they both laughed.

DAY 15:
They saw a fortune teller down the road, and they asked for their future advice.
The fortune teller said:
"My darlings, please don't waste the time of your life, spend the rest of your time together, happily." Then tears flowed out from the teller's eyes.

DAY 20:
Lily invited Derick to go to the hill
and they saw a meteor; Lily mumbled something.

DAY 28:
They sat on the bus, and because of a bumpy road Lily gave her first kiss to Derick by accident.

DAY 29:
11:37 pm:
Lily and Derick sat in the park where they first decided to play this game.

Derick:
I'm tired Lily...Do you want anything to drink? I'll buy you one...I'll just go down the road.

Lily:
An Apple Juice, that's all. Thank you.

Derick:
Wait for me.

20 minutes later
A stranger approached Lily

Stranger:
Are you a friend of Derick?

Lily:
Yes, why? What happened?

Stranger:
A reckless drunk driver ran over Derick, and he is in critical condition in the hospital.

11:57 pm:
The doctor walked out of the emergency room; he handed Lily an apple juice and a letter.

Doctor:
We found this in Derick's pocket.

Lily reads the letter and it says:
Lily, These past few weeks, I realized you are a really cute girl, and I am really falling for you-your cherished smile, your everything when we played this game. Before this game ends, I would like you to be my girlfriend for the rest of my life.
I love you, Lily.

Lily crumpled up the paper and shouted:

"Derick! I don't want you to die-
I love you; remember that night when we saw a meteor and I mumbled something. I mumbled that I wish we would be together forever and that we would never have to end this game. Please don't leave me Derick .. I love you! You can't do this to me!"

Then the clock strikes 12...

Derick's heart stopped pumping...

It was the 30th day.