The Secret Admirers of Rina

Mysterious messages, a secret admirer, and a graduation year that will turn into a real adventure.
Rina is a tireless activist and the main organizer of the celebration on the last bell day, used to solving the most incredible tasks. But one day in the school library, she finds a strange book with an encrypted message. Thus begins the game, where the stakes are her curiosity, and the main prize is the identity of the mysterious stranger known only as N.
To uncover his secret, Rina is ready to do anything: sneak into the boys' locker room, master ancient codes, and even... kiss her best friend's brother. But the closer she gets to the solution, the more suspects appear on her list: the handsome basketball player, the talented introverted artist, and that very best friend's brother who suddenly became unbearably attractive.
Who is hiding behind the letter N? And where will this intriguing game of secret admirers lead?