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/41179039, https://www.pixiv.net/en/artworks/41313862, https://www.pixiv.net/en/artworks/41520463 and https://www.pixiv.net/en/artworks/41928222

「漂と特訓済み・縄抜けの術」とは何なのか妄想した結果生まれたネタ。まだヤったことない信漂設定です。つか信、特訓自慢しすぎ。惚気にしか聞こえない。

お待たせしました１の続きです。えろ開始ご注意。信がありえないくらいデカい気がして…どうなんでしょうか？ちょ…ないわ…///一応13～14歳位の設定です。まだもうちーっとだけ続きます。

お待たせしました２の続きです。エロ度上がってますご注意。まだ…続く感じです…！

完結しました！大人の階段昇った信漂ですが、信の妙なモノローグは中２ポエムちっくで恥ずかしいですね…（年齢的にはむしろ中2で正しい）

(machine translated)
A story that came about as a result of my delusions about what ``Horito and Special Training: Rope Breaking Technique'' is. This is a Shinboku setting that I have never done before. Tsukanobu brags about his special training too much. All I can hear is admiration.

Sorry to keep you waiting, this is the continuation of Part 1. Beware of the erotic start. I feel like it's so big that I can't believe it...what's going on? I don't know...///It's set to be around 13-14 years old. It will continue for a while.

Sorry to keep you waiting, this is the continuation of Part 2. Please note that the level of eroticism has increased. It feels like it's still going on...!

It's completed! Although Shinryo has climbed the ladder of adulthood, Shin's strange monologue is a bit like a 2nd year middle school poem, which is embarrassing...(In terms of age, he's actually a 2nd year middle schooler)