Pairing (Threesome, rather): Koyama/Ryo/Shige. NishiKoyaTo?
Summary: Koyama and Shige are together, Ryo finds out there's more to their relationship than meets the eye when he's invited to join them. Then there's lots of naughty sex.
Warnings: BDSM, although more D/s. Submissive Shige, orgasm denial.
( My first fake cut, actually )