Shirushi (印)

Overview
Shirushi (印, lit. mark/sign) is a Japanese Yume Nikki Fangame created by TaSK in RPG Maker 2000.

Gameplay
You start as Yatsuki, a girl who refuses to leave her room. She can travel to the dream world by sleeping on her bed. Her main task is to collect Stoicheios in certain dream worlds. You can save the game by interacting with the notebook on the desk.