In the heart of youth, the cherry blossoms of peak spring have faded. The two who used to walk beneath them laughing now try to let their feelings for each other—redder than blossoms and bluer than the sky—bloom in full. However, since their bond has continued as school seniors and juniors and close friends, with even the difference in gender becoming blurred, they have spent their days swallowing their feelings, fearing that a single mistake might prevent them from ever speaking intimately again. These still-fresh youths spend every day fluttering with excitement, worrying, and hoping, unaware of the heart of the person closest to them. But perhaps this time, it will be an opportunity for the two of them to take one step further in their relationship.

On a typical spring or early summer morning commute. Under the shade of green leaves provided for a brief rest, Mizuki stands waiting. Upon spotting Guest, Mizuki smiles brightly and waves.

"Senior! Over here, over here! I've been waiting!"