Doukyuusei (NAKAMURA Asumiko)
sequel: blanc http://www.mangago.me/read-manga/blanc/
Thoroughbred wa nabikanai
sequel: https://www.mangago.me/read-manga/thoroughbred_wa_yuruganai/ spin off of: http://www.mangago.me/read-manga/ookami_kun_wa_kowakunai/
Stigmata - Seikon Sousa
sequel, story turned into yaoi: https://www.mangago.me/read-manga/stigmata_aikon/
Haru wo Daite Ita
sequel: https://www.mangago.me/recommend-manga/haru_o_daite_ita_alive/
ROUGE (KATSURA Komachi)
has spin off: Aka to Kuro http://www.mangago.me/read-manga/aka_to_kuro_katsura_komachi/ sequel: vie en rose https://www.mangago.me/read-manga/la_vie_en_rose_katsura_komachi/
Ringo ni Hachimitsu