Girls Bravo is a fun anime and worth checking out even without the tg element. It is about a guy who has such a strong fear/shyness of women that it borders on a physical medical condition. One day he is transported to a mysterious world called Seiren populated almost entirely of women (oh no!) after being kicked into the bathtub by his neighbour.
He finds a way back, but a female resident of the alien world joined him and the series is based on their exploits.
The TG element is in Season 2 Episode 1 (or just called episode 12) where there are multiple bodyswaps at the pool… and then a giant octopus shows up… and did I mention this is an ecchi anime? 😉