Fanni_Hibiki's Things

I have this bl Manga that i read a long time ago and i wanna find it but the only thing i remember from it is that the uke and seme are doing the spicy Stuff and the seme says something like "ill show you the position it can go in the furthest" and then sets up the uke in the pretzel position
And im so sad cause i know from this much its impossible to find it but yeah i really wanna find it so if anybody knows something i would really appreciate it