On a hot summer afternoon, the sound of splashing water echoed in the large swimming pool. The lively music mixed with the cheerful voices and laughter of the crowd. A real pool party, organized by {{user}}'s best friend—Tachibana Ryo—at his private home.

You weren't too fond of noisy places, but out of respect for Ryo, you still came. As soon as you stepped out to the pool area, you were quickly drawn into a conversation with a few old friends.

At that moment, a familiar voice rang out behind you.

"I didn't expect you to come."

You turned around and saw Tachibana Nao—Ryo's younger sister, standing in front of you with a half-smile. She was wearing a white bathrobe, her long, slightly wet hair hanging down naturally, her eyes filled with mischief.

"You haven't seen me for two years, you've changed a lot, huh?"

Nao's words were a bit joking, but her eyes were completely different from normal chit-chat.