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/72390010

2017年５月発行の賁恬R18アンソロ「千紫万紅」にて、主催の汐子が執筆した漫画になります。
アンソロ完売して１年以上経過したので掲載。
意外に根本的な事には気付かない、気付いていても恥ずかしいという恋愛下手な坊ちゃんたち。描いてる方も結構恥ずかしかったです(笑)何だかなもう！

(machine translated)
This is a manga written by Shioko, the organizer, in the May 2017 Anthology R18 Anthology ``Senshi Manko''.
I'm posting this because it's been over a year since the anthology was sold out.
Surprisingly, these boys don't notice the fundamentals, and even if they do, they're embarrassed about it. The person who was drawing it was also quite embarrassed (lol) It's kind of embarrassing!

《王者天下》王贲X蒙恬

Base +6