Examine Midori's capsule with Shizuki in your party and talk to her. Eventually she'll talk about how it'll be embarrassing for her to wake up with you watching. So leave Shizuki there, walk out to the town and use the tree in the house you found bug-girl to teleport back. If you got the landslide event before....teleport to the house, fight the mob next to the car near the landslide and then teleport back.
When you get back, the capsule should be open and Midori talking to Shizuki. Highly recommend saving before you leave alone, cause you won't be able to save once her capsule is open and from there you have to make important decisions that can affect the ending you get.