I'm not sure exactly which specific manga fits this description. But it could potentially be in the realm of adult or alternative manga styles, appealing to a very specific audience with particular interests.
It could be a manga that focuses on the intense and secretive relationship that develops between the two cops while they're on their undercover mission.
I'm not sure exactly. Maybe it's one that features a complex relationship with Endou at the center.
Well, some yaoi manga might incorporate toys in a romantic or playful context. Maybe it's used to enhance the interaction between the characters.
I think one example could be a manga where the main characters use origami to express their love or communicate secretly.
Some yaoi manga with kidnapping themes might focus on power dynamics and the development of a complex relationship between the captor and the captive.
There are several yaoi manga that involve bands. One example could be 'Music Hearts' where the main characters are in a band and their relationship develops within that context.
Maybe it's a sci-fi furry comic where the tentacles are part of some alien creature's anatomy. Or it could be a horror-themed one where they create a creepy atmosphere.
Yaoi manga cops often feature intense emotional bonds and complex relationships between the characters. They might have unique storylines and settings that add to the appeal.
Such yaoi manga is inappropriate and unethical. It's not something that should be promoted or discussed positively.
I don't have an immediate answer for you. You could try looking through manga review blogs or asking in manga enthusiast communities. They might have some leads for you on this particular kind of yaoi manga.