Yume Kayoi (夢通い)

Overview
Yume Kayoi (夢通い) is a Japanese Yume Nikki Fangame created by Humiha (ふみは), the creator of Tsukumono Yume (つくものゆめ) and the cocreator of Yume wa Maeyono (ゆめはまえよの).

Gameplay
You star as two girls named Kotozuki (言付き) and Satotsuki (里付き), who stay in different apartments and can't leave their room. You can switch between the protagonists by interacting with the big doll in the room, interacting with the notebook on the desk allows you to save the game.

They can enter their dream world by sleeping on their bed, and exiting the door in their dream roon will bring them to the apartment hallway with doors that connect to several worlds. The main task is to collect effects by interacting with something in certain worlds.