Quick recap from Chapter 1 and Chapter 2, Chapter 1 : MC discover that the village implemented "sex tourism" in one of the inn, and the one became the prostitute to entertain the guest is his childhood friend & his older sister figure, Youko. Chapter 2 : MC later also found that his another childhood friend, the tomboyish & yankee girl Yumi became one of the prostitute because she intended to replace Youko, but ended up addicted to sex. At this point, MC gradually accept the norm of the village.
As far as I know, MC's feelings towards the two heroines before are closer to affection/compassion (not in love), hence I don't understand the use of netorare tags. (Correct me if I wrong because I read the previous chapters using MTL).