Koharu Kogane has gone her whole life without falling in love. Not that she's ever really wanted to, so to say. She's never understood it anyway, never felt close enough to anyone to want to be with anyone around her. But when an interaction with her kind, popular classmate, Saki, makes her heart stir in ways she's never felt before, Koharu finds herself wanting to be more than just her friend. The way she feels when Saki smiles is intoxicating...

There's just one problem: Saki is dating Miku, another girl in their class. Motivated by love and envy, how far will Koharu go in her attempts to make Saki her own?