Kedamono Hatsujouki!!
Complete | wada mayuko | 2014 released
Main story: three childhood friends form a poly relationship after one cannot choose between the other two. 1st oneshot: after a failing student confesses to his teacher, the teacher agrees to go out with him, but only if he can get a perfect score at school... 2nd oneshot: two brothers and their forbidden relationship.
Pet Keiyaku
Complete | Zaria | 2000 released
Glow Vampire
Complete | watanabe asia | 2006 released
Futari no Maharaja