SamBox9029, 
Go on camping trip with Miyu
Go hiking with Miyu and explore the area around your campsite
Go fishing with Miyu at the nearest stream and catch fish for dinner
Build campfire with Miyu and cook fish, then after eating fish settle down for the night near campfire and cuddle with Miyu.
Do this for as long as you and Miyu want the trip to last :hoshino_smug: