Discommunication Spirit World. Takaomi and Arika meet a young girl named Tsugumi Yoshimoto who has been asleep since the incident that took place when she was a teenager. What happened to her in the past? Can she be healed? The couple seeks to solve this mystery with the aid of the Mishima Sisters — Toko and Rinko, who are Yume Tsukai (dream messengers) with an uncanny ability to manipulate dreams. What's the truth behind this mystery?