[keichiro]

Maybe i can help you to give a little another manga echii, mature and school life with link
-Zippy Ziggy (Martial arts, echii, comedy)

http://www.mangatraders.com/search/?term=zippy+ziggy&searchSeries=1&filesSearch=1

-Bousho shoujo (Echii, mature, school Life)

http://www.mangaworld.org/projects/bousou.html

-Koe de oshigoto (echii, mature, school life)

http://www.mangatraders.com/search/?term=koe+de+oshigoto&searchSeries=1&filesSearch=1

-Nana to kaoru (SM, mature, echii)

http://www.mangatraders.com/search/?term=nana+to+kaoru&searchSeries=1&filesSearch=1

-Umisho (Echii, school life)

http://www.mangatraders.com/search/?term=umisho&searchSeries=1&filesSearch=1

-Love comedy style (echii, school life)

http://www.mangaworld.org/projects/lcs.html

-glass no megami (echii, university)

http://www.mangaworld.org/projects/glass_no_megami.html

-My Balls (Echii, comedy)

http://www.mangatraders.com/search/?term=my+balls&searchSeries=1&filesSearch=1

-My lovely Ghost kana (Echii, daily life)

http://www.mangaworld.org/projects/kana.html

-Yuria 100 shiki (echii, daily life)

http://www.mangaworld.org/projects/yuria.html

-Change 123 (echii, school life, martial arts)

http://www.mangatraders.com/search/?term=change+123&searchSeries=1&filesSearch=1

-onani master kurosawa (echii, onani, school life)

http://www.mangatraders.com/search/?term=onani+master+kurosawa&searchSeries=1&filesSearch=1

I hope you like it , good luck for hunting