Yuki is a high school girl who has been worrying about the way her older boyfriend in university and her are dating. One day, at the end of a terrible date, she accidentally bumped into her class representative. Apparently, he was there to do some stargazing and when she joined him and looked through his telescope, that's when she saw a beautiful world unlike any she's seen before...!

While listening to his innocent talk about stars, she can't help but get pulled along. When she realised that it's been a while that she had laughed as heartily as she did then, it got her questioning the way she and her boyfriend are dating even more...

This is the heart-swaying and prism-like romance where a new love begins to sprout as another ends.