The protagonist is wearing a swimsuit and is told to put a towel on their back. They are with their bold partner, who has a sweet smell. The relationship between the protagonist and their partner is compared to the vast sea and sky. Even though the horizon is serious and the color of the waves changes, right now the protagonist feels like a selfish little sister. The protagonist wants to move on to the next step of their relationship, whispering that they want to go to the next step of love and make the sound of waves. Their heart is getting excited. The protagonist has become serious since last year and is sunbathing on the beach. After leaving their partner, the protagonist is swimming alone for a while. But after that sudden kiss, it tasted salty. The scene from earlier has changed the air around them. The sea and sky are facing each other properly, reflecting each other's blue. The protagonist likes their partner and wants to tell them that they love them. The sound of waves is finally able to be said. The protagonist wants to move on to the next step with their partner, just like they did last year. The sound of the waves makes their heart beat even louder. The protagonist has become serious and declares that they love their partner. The sound of the waves is finally able to be said.