A high school girl and boy are part of the student council at a pricey school. They have a crush on one another, but have kept it under wraps so far. With awareness and an inkling of what the other one feels for each the challenge becomes to make the opposite side profess his or her love first.
Rin, Yuu, Koyomi and Keita are friends in high school who live in the same apartment building. Rin and Yuu like each other, but they don’t tell each other, until Kazuma shows up.
Kogure Nao is a shy and cute high school student. One day, Onise Taiga asks her "would you like to date with me on the promise that we will get married?" Nao is unable to turn down his proposal because she is scared of him. Taiga has red hair and piercing eyes. His appearance gives off the impression that he is a bad boy, but he is actually considerate to others and good at cooking. After getting to know Taiga, Nao begins to have feelings for him.
Ten years have passed since Tsukushi Makino and Domyoji's F4 graduated from Eitoku Academy - a once prestigious school which is now suffering a decline in funding and student enrollment. Oto attends Eitoku Academy but is secretly just a"commoner" who is struggling financially due to the bankruptcy of her father's company. She is afraid her secret will be disclosed if she becomes the target of "commoner hunting" which Kaguragi's C5 is doing to maintain the school's dignity. Meanwhile, Momonozono Academy where Tenma Hase serves as student council president is quickly catching up to Eitoku Academy as a result of Tenma's achievements. Tenma and Oto are in fact engaged to one another and are to be married, but only on the condition that Oto attends Eitoku Academy until she turns 18.
