If you're looking for anime similar to Kodomo no Jikan: Houkago, you might like these titles.
Tairaku is a teacher who wants nothing more than to bed his co-worker, Miss Satsuki, but his priorities soon change upon meeting daughter-of-the-mob Aya Shirakaba! With a reward of 100 million yen upon her graduation, Tairaku is strongarmed into the position of babysitter by the mob boss himself, under the condition that he protect his young lass from any who would harm her. Unfortunately for Tairaku, more than one street punk and classmate wants to get in Aya's pants, willing or not! Can Tairaku keep Aya's virginity intact, lest he find himself sleeping with the fishes?
Before Kyoko became the manager of Maison Ikkoku, she had an unconventional courtship with her high school teacher, Soichiro Otonashi. With a heavy heart, Kyoko remembers the brief time she spent with her first love and first husband.
Asami Onohara is a typical seventeen-year-old high school girl – except for the fact that she’s married to her physics teacher, Kyousuke Ichimaru. Since a relationship between a teacher and student is inappropriate, the two must hide their status from the world; in fact, the two have not yet consummated their marriage. As their everyday lives continue, new obstacles to their love present themselves daily. Can the two keep their secret safe, and will Kyousuke ever show his affection for Asami?
Ehara Tokiro is looking forward to his first day as a new teacher in an esteemed all-girls school, dreaming of young and naive females being coy and flirting with him. What Mr. Tokiro wasn’t expecting was to become intimate with the sexually-charged Miyako Hase, especially after discovering the randy little minx is one of his new students! Using her feminine wiles and dirty tricks, Miyako makes a proposition to her homeroom teacher that no red-blooded male could refuse. The only question is, can Ehara’s teaching principles overcome the stirring in his loins when confronted by a beautiful -and naked - pupil?
Graduation has come and gone and now the teachers look forward to a well-deserved vacation with their new boyfriends. Unfortunately, things rarely go according to plan when their hotel doesn’t have enough rooms for everyone.
Nano is a very popular teacher at school but always has problems with the troublemaker Souji. One day she goes to a matchmaking and meets a very nice guy. Only until she finds out that the matchmaking partner was Souji. Can Nano get away from Souji?!
High schooler Masahiro Setagawa is a fairly helpless delinquent, so much so that the neighborhood bullies use him to run their errands. His life changes when he meets high school teacher Kosuke Oshiba, a man whose fighting abilities have earned him a powerful reputation on the streets. Oshiba finds himself with a desire to protect Setagawa, and despite swearing that he's not interested in men, Setagawa finds himself getting more involved in Oshiba's affairs…
"I want you to be the first one to eat me." Akazu saves Okami as a pervert is about to snatch her skirt. She invites Akazu to her home to treat his wounds when he finds out that Okami had planned everything! "I'm a teacher, and you're..." Will Okami's plans succeed? Or will Akazu hold back?
Ichiro Sato is about as average as a student can get… except for his above-average ability to land himself in totally awkward, intensely risqué situations with his no-nonsense teacher, Kana Kojima! Ichiro has his hands full dealing with these steamy shenanigans and unexpected encounters in the most unlikely places. At least it can't get any worse, right?
Kei Kusanagi is a shy teenage boy with no romantic experience whatsoever... until he finds out that his hot new teacher is actually an alien! In order to conceal her identity, the two are forced into a pretend marriage... but is it really a pretense, or are they actually falling in love?