Trip Lovers
Yuuta gets sucked into a parellel world where people with black hair are SUPER rare so he's chased and pursued constantly until he's taken in by a nice couple and settles in one town where he becomes a popular cook. Then he's taken by a prince who's fallen in love with him and taken to his estate. There's unrest though because people want to kill the prince and he's struggling with his own feelings about the prince. A nice, unique and interesting storyline- I liked it a lot!
Taiyou No Kikoushi
Hikaru works for a tourism agency and one day he bumps into a foreigner, Leo, on the ground in the park, takes him in, and feeds him. It's obvious that Leo is more than what he seems. Hikaru falls for him and they sleep together. Hikaru is heart-broken to find out that Leo is really a prince and they can't be together. This was a very old-feeling manga, both with the plot and art style.
Private Prince
Kaoru get a job at a store with a cursed prince/mannequin who only comes to life when only Kaoru is there. There’s also some drama involving a backstabbing coworker. This is sometimes confusing, sometimes dull (when they’re talking about clothes) but the basic plot is ok. Shame this is so unresolved.
Tsuki to Yabanjin
Uriel is a “cursed” prince forced to live in, basically, captivity until he convinces his attendant Alvie to let him go near the border of a neighboring country that he’s fascinated with. He ends up getting kidnapped by a hero of that country, who falls for him hard. Nice, passionate love story!
Kuro Ouji no Iinari ni Naranai!
Hime used to be a nerd and is secretly a shoujo fan, turns his life around at a new school and became the school prince until he's unseated by the new student, Arata. Arata calls him a princess, knows his secret, and kisses him forcefully.
Senya Ichiya Romanesque