High-school student Chihiro is small and cute, and gets molested by middle-aged men on the train. But it wasn't always this way – up through elementary. Chihiro was bigger than all the other boys and he defended his friend, smaller and gentler Keigo, from the bullies. That is, until Keigo was transferred to Vienna!

Despite promising to write, Chihiro had long ago left behind the memories of Keigo. Now, Keigo is coming back to Japan – and what's more, they'll be living under one roof! Will Chihiro accept the confession from Keigo, who has become like a stranger to Chihiro?