There's no cheating. The professor isn't married. He wears the ring to keep people away.

Thank you

You sure ?

Yeah I saw the raws. It's basically a 5 chapter p*rn w/ plot. Although the bottom does believe the top is married till the last chapter.


Spoilers
.
.
.
The bottom gets upset seeing the ring so the top puts it on him and tells him it's not a wedding ring.

There is a hint at the end that the bottom has a bun in the oven.

I see...