Choki's manga / #Gender switch(4)

Uke turns into a girl every night and needs semen to turn back to a male. The 2 seme are knights and cousins from a noble family while the uke is a comoner and a librarian so he feels inferior

Uke turns into a girl after a drug and getting semen inside cab turn her back into a guy for a day. Uke works in seme's hostess bar as a waiter/bodyguard (guy) and a hostess (girl). Seme used to be a yakuza

Uke turns into a girl because of a fairy item. This is a supernatural world and uke was a part of a team that did quests to earn money tho uke wasn't the best so he did mostly chores and cooking.

Guy used to be a playboy, but turns into a girl and swaps back after he gets semen inside. Dropped at 63