Thank you so much for answering me. The Polymorphous' creator is my academic colleague! I'll check his game again. :)
Viewing post in Yes, Brother - [VISUAL UPDATE! v1.3.9b] comments
you can check a little bit of my research on https://maledollstudio.itch.io/yes-brother/devlog/149241/girls-are-lgbt-boys-are-just-gay-the-appropriation-of-the-tag-lgbt-by-lesbian-protagonism :)