Chapter 5 is a one-shot written by this author, and is not related to the main story.
"I'll make you feel so good you won't be able to forget..." Shinogu works in an office by day and sits in a bar as a regular at night... and recently has been talked into going to a hotel with a charmer named Shindo. For Shinogu, sex is reserved for Fridays and is limited to one-night-stands but Shindo has other plans, and makes it clear. "I'll make you mine." Sweet, loving embrace unlike anything felt before. Shinogu can't resist the strong compassion and straightforward words of kindness... this was supposed to be a one-time deal. Just as things seem to be getting back to the norm, this special someone appears as the newest client in a project...!