They dont turn straight. FL was really reading a BL webtoon but because her soul was not complete, she misremembered something. What she thought she read was a revelation from her "father" so she will know people she'll meet once she becomes rachell. The old duke is still gay and loved ray's father. Ray's father is still gay (bisexual) cause after Luci's father broke up with him, he eventually fell in love with Ray's mom.

okay can anyone tell me if there's still gay people in the world she transmigrates to or does everyone suddenly turn straight and in love with mc? because that'd just be homophobic and weird af. why even make the setting a BL atp.