Matsuoka Sachi, a 16 year old in her 3rd year at highschool, was always helping people with their problems, academically or emotionally. But no one ever helped her with her problems. She was the smartest person in her class, but had never been in love or had a crush on anyone and yet gave the best advice to everyone. But when the holiday of love and romance gets closer, her usually empty heart is taken by a mysterious new boy. Will she finally find love or will she remain lonely?

A wonderful month for everyone who spent their time together with their only love. However, Akanika Sumabara, a young beautiful, tomboyish, first year high school girl doesn't want to do the same thing. Five years ago, she lost her fate to her childhood friend who promise to marry her and they will meet each other under their tree of Kamisami Park every day. However, the boy did not come in the designated area. She waited for almost two days and one night but the boy have never shown. She promised to herself that she will forget him forever and never wanted to see him again. And also, she stipulate that she would never fall in love again with men. Five years later, she met her senior named Takeroshi Kurisimo, a young, second year high school, a campus heartthrob in her middle school and now in her high school. His face is the same as her childhood friend. Even she forgot his named, whenever she saw him she remembers the sad memories. What would happened if this two get along together?