Create a new genre ...
how do you do it? idk ...
Btw: if you are thinking about creating a rimuru but except elemental mana condensed and gaining sentence as a traditional slime existence, you are creating a fleshy blob (wiggling mashed mussels) gaining sentience through bio-engineering as cells form a collective intelligence and then making a friend with a humanoid robot ( running Ai ) then I think there are too many things to consider like is in your world have any virtual world thinggy ? where ais collectively talk with one another and such, then if, in the virtual world, a simulation of seggs can be done .. then you can and should include BL tag, but if your story is mostly based on physical life scenarios where they just support watch other then no it's not needed,
Then you can even consider how they will reproduce as those kinds of life forms.. is it just programs ? or they can use the theory of mutation as two different lifeforms DNA or where it can be bio ingenerated cells forming a network with metals and change the compound to something ells .. you can stretch further by introduced mana or qi type energy that if applied correctly can theoretically be used any scenarios.. or if it's totally scientific world then use new terms like "dark matter corruption" or something...
Imagine scenarios, create new turms if needed, and go ballistic ..
haaa .. need a cookie and coffee after thinking and talking too much..

huh !! you want too

.. here you go ...?