messages.role: user
messages.content: Please write the first chapter for a light novel based on the manga "Masamune-kun no Revenge" but with a slightly different story and a completely different plot, but repeating the plot of this manga but written in the style of Japanese light novels. Light novel genre: everyday life, school, romantic comedy. The main character is Rina Himura and she is a 2-C at Kaisei Secondary School student. Fate pits her against a mysterious player. This player was her classmate who, for unknown reasons, stopped going to school a year ago. Rina didn’t know her because she transferred to school after her classmate stopped going to school. This mysterious student turned out to be Konoha Misumi. Unexpectedly for everyone, their homeroom teacher announced that Konoha Misumi would return to school tomorrow. Rina couldn't get rid of her thoughts about Konoha. Who was she? Why did she disappear for so long? And why come back now after a whole year? Does Konoha remember school? Please write detailed dialogues. Please describe Rina’s entire day from the very early morning from the moment she woke up until she returned home. Add a description of how Rina ate breakfast and how she took a bento and onigiri with umeboshi to school. Please introduce characters into the story who are similar in character to the characters from the manga "Masamune-kun no Revenge".