Takaramono wa Hako no Naka

From Bakeneko Scanlations: Tokura, an associate university professor and mystery novel writer, has a lovers relationship with Gin, the man he has yearned for, for a long time. However, it seems that Tokura is dealing with quite complicated feelings...? Note: Please do NOT add links to doujinshi series from the main series info page. There are simply too many series to list. Instead, go to each specific doujinshi page and place an "Adapted From" link to the main series.