Sabishiro Haruka is a dull high school girl who accidentally got her secret found out by the school's popular guy, Hijikawa Kotoba! "That's it. This is the end of my high school life..." While she was feeling despair over this, she received some unexpected words from him instead. And somehow, that's how she also came to learn a secret of Hijikawa's that he's kept hidden for so long! Since that day, their life as shared keepers of each others' secrets begin...!? This is an exciting and youthful love story about shared secrets that's especially dedicated to all of you who can't reveal your real selves!