Natsumi is at work when she realizes she left her phone. At that very moment, Naruo rings her and Kazuhiro, who dropped by the house, picks up. Kazuhiro grows suspicious. Why was the "post office" calling Natsumi? Later that night, Natsumi dines with colleagues at the office as Kazuhiro strolls in unexpectedly with Shohei, an up-and-coming author.

Natsumi is exhausted from working non-stop but finds Naruo's presence comforting. Anxiety worsens when Director Fujii wants her to secure Shohei's next novel, even if that means blind-siding Kazuhiro. Natsumi loves Shohei's talent and yearns to work with him at any cost. Natsumi fumes when she finally gets home to find Kazuhiro relaxing in the bath.

Natsumi visits Naruo at his house. Kazuhiro calls out of the blue. Natsumi doesn't pick up, but still rouses Naruo's suspicions.The next day, Natsumi tries to persuade Shohei to write his next piece for her. He repeatedly avoids the subject, to Natsumi's frustration, which worsens when Kazuhiro texts her the next day to press her on why she didn't pick up.