I felt that Kingdom works were a bit lacking so I I'd scour Pixiv. I don't speak Japanese so I just machine translated the title.

https://www.pixiv.net/en/artworks/58965466

2015年１月発行。完売から１年以上経ち、コピー誌ではないんですが、かなり薄くて安価だったという事により、今回掲載します。
信、王賁、蒙恬の三煌剣の３Pマンガです。とにかく頭オカシイです。
※CPは賁恬、信恬になりますのでご注意★

(machine translated)
Published in January 2015. It's been over a year since it was sold out, and although it's not a copy magazine, I'm posting it here because it was quite thin and cheap.
This is a 3P manga of the Sankakuken of Shin, Wang Jun, and Meng Tian. Anyway, it's crazy.
*Please note that the CP will be Yutaka and Shinkyo★