Hi, I'm looking for a specific manga I read awhile ago. I remember it being a shoujo oneshot about a girl who makes a marriage promise with her childhood friend. They don't see each other for years and he grows up to be either an actor or an idol, I forget which. He comes back to see her about a month before his 16th or 18th birthday intending to keep the promise. His manager gave him a deadline of marrying her by his birthday or he would make him give up. If anyone knows the title of this that would be great.