i need more romance/mature mangas?

[Chewy]

I've read these so far:
Asa Made, Motto
Love Monster
Wild Ones
Oresama Teacher
Iya x Shite
Rhapsody in Heaven
Hana ni Arashi
Yoru Made Matenai,
Do You Want To Try?
Ren-ai Shijou Shugi
Bishounen no Oheya
Koibana! Koiseyo Hanabi
Akuma na Eros
Bloody Kiss
Kyou, Koi wo Hajimemasu
Jikiru de Haido na Kare
Millennium Snow
Absolute Boyfriend
Kinjirareta Ai no Kajitsu
Kurozuka
Soredake Kai
Haru Yo Koi
Kindan Princess
Taiken
Barajou no Kiss
Faster Than a Kiss
Majipikoru
Love Collage
Koibana! Koiseyo Hanabi
Fly High!
NG Boy x Paradise
Koigokoro Senpukuchuu
Otomentaru
Dengeki Daisy
Chocolate Cosmos
Love Berrish!
Imadoki
Tomodachi
AAA
Zenbu Chodai
Gal Kadou
99% Cacao
Boku kara Kimi ga Kienai
Triple Honey
Shuu 7
Bokura wa Itsumo
Suki desu Suzuki-kun!!
Ikenai Teacher, Iketeru Darling
Hoshigari Love Dollar
Honey X Honey Drops
Midnight Children
Desire Climax
After School Wedding
Love Celeb
Midnight Secretary
Haou Airen
Rockin' Heaven
Vampire Knight
Hana to Akuma
anything with romance school life maybe a bit supernatural no boy love or girl love please o-o

 

[SarabiPwns]

I've got two for you! Good luck!

Boku ni Natta Watashi. Comedy, Romance, Gender Bender.
The story is about Takanashi Momoko, a 16 year old girl. Her life is pretty normal, until her twin brother, Akira, disappears. Akira was supposed to enter a high class all boys school but he runs away to pursue his dream of becoming a photographer, leaving only a note explaining his actions. At first Momoko and her mother thought it was just a joke but he really didn't come back. Now Momoko's mother went ballistic and started cutting her daughters hair saying that she has to take her brother's place until he comes back. Not good for her since she has to disguise herself as a boy and what's this about being roommates with another guy? Will she be able to hide her secret and survive or will she be found out?

Bitter Virgin. Mature, Romance, Drama.
Suwa Daisuke is the ladies man of his small town high school, and he has his eye on most every girl, except for one. Aikawa Hinako isn't his type, but when he overhears a deep dark secret of hers, he finds himself thinking of her more and more.