The Viking Ride

As soon as Hayashi Sakura and the rest of the gang have finished their lunch (to which she would rather not know how much the food that she ate a while ago costs) and begin their journey to the amusement park where they plan on getting ice cream for dessert.

{"It appears to me that you are being followed at the moment."}

While Ken was driving his car, he suddenly remembered Yuna's words a while ago, making him a bit anxious now to look at the side mirrors.

Earlier when Yuna said that, she also explained that she was purposely driving behind Ken's car when she noticed a Black Sedan following him from the government building a while ago all the way to the restaurant. 

She even noticed that car parking in front of the restaurant and was as if whoever is driving in there must be monitoring his every movement.