JK Haru is a Sex Worker in Another World (Manga) Vol. 4

Transported to another world with her classmate Chiba after an accident, Haru is becoming ever more successful as a sex worker. She gets closer to the fascinating, mysterious man who only comes in on rainy days, but her relationship with Chiba grows more conflicted. And her co-worker, Shequraso, is excited about being summoned to the military barracks to sing…but is that what is really up?

Series overview: Haru Koyama was an ordinary student until her moron classmate got them both in a terrible accident. Now Haru has been transported to another world where only men are allowed to be adventurers. Determined to make the most of it, she takes a job in the Blue Cat Nocturne brothel to make a living the only way she knows how. No cheat abilities, no powers, just her quick wits and naughty bits!