A worried Yui files a missing persons report for her boyfriend, Naoki, and encounters Detective Uozumi. However, the detective later runs into Naoki in the street.

Determined to know what happened to Naoki, Yui asks Uozumi to investigate. At Naoki's apartment, they discover a curious text message on his computer.

The detectives tell Yui that Naoki may have been involved in a murder. Later, they meet with Naoki's father, who speaks about his past with his son.

Wondering why his body hasn't been found yet, Naoki decides to search for it; Yui learns that a boy who came to Naoki's restaurant has gone missing.

As more facts of the case come to light, Rio cryptically threatens Yui at her salon; Naoki invites Yui on a date through Uozumi.

Upset that Yui is moving into his apartment, Naoki asks Uozumi to stop her; Uozumi's sister gives Naoki a hint about how his spirit can move on.