Mankai Darling
Complete | yamamoto kotetsuko | 2009 released
2015-08-23 10:45 marked
Prequel is koi to wana
Koi To Wana
Complete | Yamamoto Kotetsuko | 2005 released
2015-07-22 20:10 marked
Sequel is Mankai Darling
Hisho to Yajuu
Complete | takahashi yuu | 2006 released
2015-07-30 08:26 marked
More, check Himegoto wa Ouji no Tashinami and Ouji to Joujin, don't know if their prequel or sequel.
Himegoto wa Ouji no Tashinami
Complete | takahashi yuu | 2008 released
2015-07-30 05:37 marked
Prequel is Hisho to Yajuu. Also, there is a sequel to this (Himegoto Wa Ouji No Tashinami) - Ouji to Joujin.
Ouji to Joujin
Complete | takahashi yuu | 2008 released
2015-07-30 04:39 marked
Hisho to Yajiin, and Himegoto wa Ouji no Tashinami
Nee, Sensei