Is there BL where the uke loses his memory and the seme takes advantage of it to convince ...

yes there is!! and istg this is sooooo good!

https://www.mangago.me/read-manga/a_room_without_space_side_story_1/

Don’t do my boy dirty like that He never manipulated the uke into thinking they were boyfriends lmao and he most definitely did not take advantage of uke’s memory-loss

Have you read this? It can get confusing tbh, but I thought the overall plot was p interesting. Lots of manipulation and taking advantage of the uke bcs of his memory-loss:
https://www.mangago.me/read-manga/moritat/

But he never did that

he did not? gosh I don't remember the story then (and I only read till 'uke loses memory' my gosh T_T)

doraemon, please use the gadgets in your pocket to finish reading the story.

lol will do

Thanks! (๑•ㅂ•)و✧