Shen Ye was born and raised in China. He liked video games, manga, and anime dance, and was a shut-in through and through. Aside from having a handsome face, there was nothing special about him. Oh, right, he also had a sister who was so into gay stuff that she wanted to turn her own brother gay.
He never expected to transmigrate before his sister could cause any trouble, waking up in the place she called "Thailand." That's right.
This was Thailand, a country famous for its gender reassignment surgery, one of Asia's three great magical transformations. It had more than two genders, including a third gender. More importantly, unlike in China, same-sex relationships were not rejected here. In fact, BL was thriving in the entertainment and film industries. And by sheer coincidence, he was a newcomer who had just entered the Thai entertainment industry, preparing to star in a school BL drama.
[This is just a random idea. I haven't thought it through much. It's a light comedy, and I'll figure out the romance plot as I go. The protagonist initially accepts his new identity and reluctantly plays along. P.S. This is an alternate modern setting. China is still China, but after the transmigration, it's not the world the protagonist comes from. Thailand's entertainment industry is also fictional, so please don't compare it to reality. Any resemblance is purely coincidental??]
Theme: A shut-in lets loose and discovers he actually enjoys it