Kimi no Ahimoto de Ai wo shiru
Sub hates being a sub and has taken meds to suppress it, but now he can no longer suppress and needs a Dom, he gets paired with a kind and gentle one who teaches him the ropes. Really loved this one, has consent and is wholesome. Both the subs and Dom were great characters.
Osuwari, Yoku Dekimashita
The MC a soccer player becomes a sub after meeting a Dom, he must learn to adjust to his new secondary gender with the help of the Dom ML, a doctor. Consent, wholesome and lots of communication, green flags for both with lots of amazing characters.
Good Work Watase-san
MC is a sub that wants to top and ML is a Dom that wants to bottom, they become a switch sub/Dom pair, where they actually switch secondary genders. Both wear collars and bracelets as a switch couple. Story was basic but it was super green flags, loving couple
Inu wa Kogarete Hizamazuku