Teacher x student:
http://www.mangago.zone/read-manga/abiru_junjou/
http://www.mangago.zone/read-manga/koi_ni_nare/
http://www.mangago.zone/read-manga/ashita_no_kimi_wa_koko_ni_inai/
http://www.mangago.zone/read-manga/dekiai_rule/
http://www.mangago.zone/read-manga/sono_kuchibiru_ni_ai_wo/
http://www.mangago.zone/read-manga/17_sai_no_hisoka_na_yokujou/
Student x teacher:
http://www.mangago.zone/read-manga/oni_ni_hatsujou/
http://www.mangago.zone/read-manga/ano_kado_wo_magatta_tokoro/
http://www.mangago.zone/read-manga/nee_sensei/
http://www.mangago.zone/read-manga/kininaru_ano_ko/
http://www.mangago.zone/read-manga/free_punch/
http://www.mangago.zone/read-manga/dou_imo_nara_nai/
The uke who is a teacher and a host at the same time?
http://www.mangago.zone/read-manga/only_you_tohjoh_asami/tr/94054/page/163/ ?
http://www.mangago.zone/read-manga/tsuyogari/
(ch.: 1.+3.)
http://www.mangago.zone/read-manga/zenryousei_ginsei_gakuen_monogatari/
(one of the stories)
do you know what manga have relationship between uke teacher - seme student. and the uke also work as a host?