"Sachiko-sama would be taking care of the train tickets, right? Remember to pay Sachiko-sama back the train fee, as soon as possible!"
"Okay, okay."
Taking everything along, Yumi got into the car's back seat.

"Madam , where would you like to go?"
Dad turned back from the driver's seat and smiled.
"M Station, please."
"My pleasure, madam."

After the door was closed, Yuki walked near the car and knocked on the window.
"What?"
Yumi drew down the window, and Yuki poked her cheek with his pointing finger.
"Relax, relax. It is a just summerhouse, right?"
Do I look so tense? Yumi followed Yuki and poked her cheek, and realized that her face muscles was growing tense from some time ago.
"It is not like you are going to a battlefield. So just sit back and relax this short vacation treat."
"...Thanks."

Yuki left the car, so Dad quietly started the car.
"This brother of yours is pretty reliable, isn't he?"
"Yeah. I even felt defeated."
Well, though she felt defeated from a long time ago.
Looking back, Mom and Yuki was still standing in front of the house. They were facing the car and waving, despite that they had turned very small already.

(Relax. Relax.)
Yumi gave a slight effort to mimic Yuki, and repeated the word in her heart.
Right. No point to get tense all over.
It is just a summerhouse, right?
It is a trip to enjoy some fun time with Onee-sama, right?