Meiyo

This is the 4th book in the night series (this is a one-shot series, so you can read it on its own)

Knight Captain x Plain Knight

It's a story about a flat knight (Uke) who is forced into a relationship and becomes bonded with him. This time, the flat knight's feelings change into something more than bonded.

Seme is a quiet dog in front of Uke, and Uke is bullish and a little timid.