Looking for historical story where 2 boys grew up as rivals set in China/Korea

Other plot points:

  • The seme comes to the temple/dojo of the uke about 10 years prior after his own was destroyed/burned down. His has dark hair and the uke has brown/chestnut colored hair.

  • Set in China/Korea

  • The two boys slept in the same room and train together but don’t like each other and are always arguing

  • There’s a time skip where the seme comes back after being gone to train so he can get revenge on whoever killed his family/people.

-They become lovers midway through the story when the seme returns.

It must be completed by now. I read this prior to 2020. Any help is appreciated, thank you!