Dishonest seduction

Seducing your partner with ulterior motives, probably to swindle them, and getting exposed after having accidentally fallen for them anyways. An excellent trope. Secrecy and conflict always raise the stakes.

For shows where gay characters are hiding previously established relationships out of fear of being rejected, not in order to get something out of someone, see this list: link.

For shows where both characters agree the relationship is fake, even though one or both might already have feelings for the other, see this list: link.

For shows where characters are hiding that they're actually a monster or have superpowers, without that being malicious, see this list: link.

Anything that says RR is gender role reversed, everything else is gay.