I can't stop the overly sweet confession from my childhood friend.

"I decided a long time ago that I would tell you when I turned 18... Marry me." On the day before her 18th birthday, Hinomi, a high school junior who is incredibly popular due to her beautiful face, is proposed to by her childhood friend, Ichika. Unable to believe Ichika's feelings, who she has grown up with like a sibling, she refuses, and Ichika says something like, "Let's experiment to see if you're a potential romantic interest..." Since then, things have been...