I Can’t Tell Anyone

From Shoujo Manga Maniac:
Ruka’s an junior high student in love with her Fumi-sempai. She want to soon become an adult cause everyone see her as a little kid! But what would happen if she actually become an adult with the help of a time machine?

Title:I Can’t Tell Anyone a.k.a Dare Nimo Ie Nai!
Creator:Mayu Shinjo
Status: Oneshot
Genre: Shoujo,Sci-Fi Romance, Drama