Abiru Junjou
REALLY ADORABLE math teacher and student plus the host/gynecology student in Kabuki City
Minami no Kuni no Oujisama
Grandson who inherits and Prince get together on prince's island. Individual, connected stories. Also, doctor and student. Last is vampire and lover.
Koisuru Omocha
author/assistant, twins and their servant, president & assistant (with toys), teacher who owes money & student,
Kiken na Hokeni Counselor
counselor/doctor and student; swim team members I like this one because the one with the teacher/student is relatively easy. They have some bumps, but they're good together and don't torture themselves overmuch about it.
Dou-imo Nara Nai
First school nurse and student, then the student's father and secretary Kid's dad is annoying AF. Tsundere and keeps insisting he "doesn't know what the secretary is thinking" except it's not a "doesn't know" but a "won't accept". And he's just an ass. Kid/nurse is good and I like that the nurse gets over (mostly) being tsundere and accepts the two of them.
Wagamama Kitchen
First, teacher and student who used to be older person/little boy neighbors. I liked the first part. The second, with the salaryman and the (straight) illustrator, not so much. :( The straight guy was still too damned homophobic. :(
Koi Ni Nare!