Product: JK Haru is a Sex Worker in Another World
*record scratch* 
*freeze frame on Haru Koyama getting choked by a horny naked dude* 
Yep, that's me. You're probably wondering how I got into this situation. Not by choice, I can tell you that! It started when my weirdo classmate, Chiba, tried to save me from a runaway truck and got us both killed instead. Idiot. Then we got transported to another world, which I guess is like an otaku dream come true, or something? Chiba ends up with cheat abilities, and what do I get? Nothing! Lucky me, I get to be a sex worker instead. Gotta earn money somehow — but since I have to do it, I'm gonna kick ass at it. This world treats women even worse than the one we came from, so things get...rough. Still, I've made friends with some of the girls, and if I can juggle Chiba's idiocy and Sumo the virgin's emotions on top of all the various kinks my customers throw at me, things will be all right...won't they?

Search query: sex with mature women
Relevance: Substitute