The Society of Four Leaves (2023)

Another ancient investigative team led by two male detectives and a eunuch. The eunuch is a grey character very much like one of the two leads.

Unlikely friends solve mysteries together. There's bromance (MLC wins this one), interesting stories, hidden tribes and sorcery, the works. Good atmosphere, personal plot linking the MLs, good support cast in both cases.

The Untamed is an epic fantasy with a romance at its center, led by a problem child, Wei Wuxian who comes back from the dead in order to fix the broken world he left behind — and finally unite with his true love or lifelong bosom friend, Lan Wangji.

Obsessive ML characters, a common theme of wanting justice (in different ways), both are period/costume mystery/judicial dramas, not a lot of predictible romance (of any type), good side-kicks to the main characters.

Also, great casts in both dramas, and very good production values.

Both are historical/mysteries dramas featuring bromances where the leads are often on opposite sides.

While different time periods, both are historical/mystery dramas with a similar vibe, and interesting cases. One lead is trying to resolve the tragic death of someone close to him, and the other is an orphan with a master.

They are both ancient detective dramas where a team led by two lead detectives investigate mysterious cases.

The Imperial Coroner is another ancient investigative team. It is more of an ensemble cast but the way the cases are solved are procedurals, which is similar to League of Nobleman.

The title says it all. It also has two male leads although only one is the detective and the other is the muscle.

Both dramas relate to crimes investigation by detective male leads. They are both in the same dynasty as well.

Both dramas are historical detective dramas
Both dramas are about friendship between two male leads
Both dramas are investigative wuxia dramas
Both dramas are bromance dramas

Immortality similar to the society of the four leaves because it focus on main male leads and it’s also bromance but there hasn’t been any updates for when the dramas will air

Mature smart drama.
Similar scenario. ML trying to uncover past for revenge and clear fathers name. SML has a mysterious past that intertwines with ML's past. ML is a schemer and SML who helps ML is smart and upright.

Both of these series are bromance and beautifully contain beautiful moments between two male characters. Both have a historical and enigmatic genre and are related to the country's politics and court. And of course they are both wuxia.

SimilarGenres:
Thriller, Mystery,

Similar points:
Adapted From A Novel, Detective Fiction, Detective Male Lead, Smart Male Lead, Scholar Male Lead, Investigation