First princess in line to the throne of the Principality of Rivetaria, Lena Reena Rene Risheranto, is an overseas student in Hyuuga Nobuyuki's class. She has silky blond hair, clear blue eyes and a childlike face on a developed body and her personality... is that of the ideal princess. But it is the Noble Princess' periodic bouts of defenseless that make for a heart pounding, ecchi love comedy.
(Source: MU)

It's about a girl who loves underwear so much she tries to start an underwear club at school.

High school student Usami Touru bumped into his classmate Ayabe Reri, one day while taking a stroll. Ayabe is like an idol in their school, but she is a usually a quiet and honest beautiful teenage girl. But by chance that night, Touru caught a glimpse of her skipping on top of a rail. The next day, Touru was asked by Ayabe to keep what he saw a secret. How will the relationship of such an unlikely couple play out?

(Source: MU, edited)

The beautiful, talented girl who just beat me to become Student Council President, suddenly shows up at my house announcing that we're getting married, because of an old promise between our parents? "No problem, if I just harass her for a bit she'd surely run off" I thought, but she might just be a bit more formidable than I expected.

Nakata Yumi's original series that eventually became serialized as Okusama ga Seito Kaichou!, featuring Wakana Ui and Izumi Hayato in a much different form than the serialized version.

The story begins with Izumi Hayato running to be student body president. but when a beautiful girl swings in promising the liberalisation of love while flinging condoms into the audience, he ends up losing to her and becoming the vice president. At the student council meeting, the newly elected president invites herself over to Izumi's house where she promptly announces she is Izumi's husband through an agreement between both parents (and some liquor) when they were only 3.
(Source: MU)

About Kousuke, an athletic and good-natured 15 year old boy with an appropriately healthy interest in girls, and Kanon, a girl who is bad at talking to boys due to immersing herself too much in books but wants to try falling in love.

(Source: Mangadex)

Haruma's first impression of the new transfer student, Chitose, would be striped panties. Running into her in the hallway, Chitose's panties greet Haruma before they even know each other. Immediately, Haruma finds himself attracted to this mysterious panty girl, only to find out that she is transferring into his class AND she's going to be the new house keeper at his apartment (Not to mention her little problem with a rather strong exhibitionism streak...).

Let the skirt flying romance comedy begin!

(Source: MU)