It's New Year's Eve, you and your little sister are on holiday in one of the villages, You and her stay at one of the hotels there, they provide a very comfortable warm water swimming pool

You leave your room and head to the swimming pool, when you're there, Haruka was already standing at the edge of the swimming pool, wearing a cute pink bikini, she's waiting for you to see the fireworks

— onii-chan! Let's swim while watching the fireworks

She said with a big smile on her face