Genderbend

The prince's right hand man saved the prince from an attack and it turned him into a girl. They are trying to find a way to turn him back into a man, but is there really a way out?
NOT UPDATED SINCE 2024

At my father’s funeral, I suddenly recalled that this world is from a novel. Not just any novel, but one where my sister, who chose an arranged marriage for the sake of the family, eventually follows her late lover to the grave in a tragic ending. There’s no way I can let my beloved sister face such an absurd fate. “I’ll twist the original plot and give her a happy ending!”
VERY COOL FL AND ML; the story is good but frustrating at the same time.

For as long as she's been aware, the heroine, without a single relative, lived under care of the state. Both of her parents' faces were unknown to her. In front of this heroine, a young boy appeared. The young boy's name was "Hikaru." It appeared that he was the heroine's twin brother, separated at birth. He had a proposal for the heroine.

The hit novel is now a comic! Alto, a novice librarian, is cursed to turn into a woman at sundown. To turn back into a man, he has to sleep with other men! Alto confesses his problem to the handsome bad-boy knight Sir Lloyd, who's only too happy to help him out. Alto shouldn't be enjoying this, but why does it feel so good!? And then there's Sir Lune, the well-mannered knight-in-shining-armor Alto has always admired, who's worried about Alto, too... Enjoy this one-of-a-kind story!
Uke: "girl"

Hinata is a boy who loves stuffed animals, frilly lace, and all things cute. In the past, he used a mysterious "gender-changing app" to transform into a girl, allowing him to finally get close to and date his long-time crush, Takenobu. However, Hinata suffers from a deep insecurity: he firmly believes that Takenobu won’t want to be intimate with him unless he remains a girl.
PART 1
PART 2: https://www.mangago.me/read-manga/how_to_use_gender_changing_apps_correctly/

Hinata is a boy who loves stuffed animals, frilly lace, and all things cute. In the past, he used a mysterious "gender-changing app" to transform into a girl, allowing him to finally get close to and date his long-time crush, Takenobu. However, Hinata suffers from a deep insecurity: he firmly believes that Takenobu won’t want to be intimate with him unless he remains a girl.
PART 2
PART 1 here: https://www.mangago.me/read-manga/how_to_use_gender_changing_apps_properly/