http://www.mangago.zone/tag/yandere/
first page is all yaoi pre sure
YANDERE/POSSESSIVE
- http://www.mangago.zone/read-manga/kusatta_rasen/
- http://www.mangago.zone/read-manga/hikizuru_oto/
- http://www.mangago.zone/read-manga/imitation_mate/
- http://www.mangago.zone/read-manga/mujintou_ni_motte_iku_nara/
- http://www.mangago.zone/read-manga/stalker_s_game/
- http://www.mangago.zone/read-manga/deichuu_no_hasu/
- http://www.mangago.zone/read-manga/obey_me/
- http://www.mangago.zone/read-manga/ibitsu_no_kakera/
- http://www.mangago.zone/read-manga/yami_bl/
- Ch5: http://www.mangago.zone/read-manga/kanchigai_lokidoki_koi/
- http://www.mangago.zone/read-manga/individual_diet_preference/
- http://www.mangago.zone/read-manga/poison_and_sex/
i tagged these mangas as 'psychological' and 'twisted' which may or may not have a yandere character, but the overall theme and ambiance are similar
Yaoi yandere.