anshlh

http://www.mangago.me/read-manga/antinomy/

http://www.mangago.me/read-manga/manazashi_no_hayagane/
(World-wounded gay teacher x trainee teacher/former student)

http://www.mangago.me/read-manga/hokenshitsu_made_nan_m/
(Another reunion one, first two chaps; Asou Kai.)

http://www.mangago.me/read-manga/hageshii_ame/
(Reunited as teachers. You might find this one really good or really irritating, hehe. It's Fuwa Shinri, btw.)

http://www.mangago.me/read-manga/gekkou_no_rankan_ni_kuchinashi_no_nioi/
(Much better than the rating.)

http://www.mangago.me/read-manga/goodbye_lilac/
(Teacher x former-student-now-teacher; A bit more serious/thoghtful in tone than some.)

http://www.mangago.me/read-manga/himitsu_no_love_sensation/
(Yeah, as a story it's fairly adequate, appeals to those who like a "standard" yaoi feel and don't need anything super-deep. Spin-off/sequel of Family Simulation, especially the second story.)

http://www.mangago.me/read-manga/kyoushi_mo_iroiro_aruwakede/
(One of the better Yamato Nase ones, imho; one primary/elementary teacher who always feels inferior/inadequate compared to another and how their relationship develops.)

http://www.mangago.me/read-manga/sensei_anata_ni_chikadukitai/

http://www.mangago.me/read-manga/cherry_na_teacher/

http://www.mangago.me/read-manga/memory_of_the_future/
(A bit old-school and drab at first, but worth it if you like longer, developing relationships.)

http://www.mangago.me/read-manga/aozora_no_sunda_iro_wa/
(Shounen ai, but it's Tenzen Momoko, so it's good.)

thank you