"When I think of you, I can't soften my heartbeat, and I have the urge to cry out loud---"

The "Mighty Ice Prince" Hirano, who can do everything just perfectly, confessed to Koito.

However Koito, who is capable of doing everything clumsily, never thought Hirano's confession was serious...? This story is about all the first times Koito and Hirano experience together.