If you're looking for manga similar to Passion: Forbidden Lovers (Light Novel), you might like these titles.
While carrying Yura, the beautiful English teacher, the flirty Haga impulsively kisses him in the midst of the sports festival, in front of the whole school, no less! Yura summons him to the counseling office after school the next day. Unexpectedly, the teacher finds himself being hit on by Haga, much to his dismay. Although he started off just wanting to tease him at first, Haga ends up being serious about Yura, who’s a little coarse and cute, and wants to kiss him over and over again?!
What would a prep school teacher do to encourage a student to study for a college's entrance exam? Well he wooes him of course! The plot may not deliver anything new, but the upbeat teacher and the moody student sure do look cute together.
A cram school teacher, Uno, reunites with his former student and lover, Someya. Uno, who couldn't throw away his feelings for Someya, accepts his proposal to "be in a no-strings attached lover's relationship" and sleeps with him. The two spend their days peacefully and happily like the time when they were lovers. Then, by chance, he happens to witness Someya entering a love hotel with a woman. Uno presses for the truth, but senses something wrong with Someya's reaction...
I'm 24, a teacher, and... I'm being hit on by my 17-year-old student in front of his classmates. What kind of joke is this!? He steals a kiss from me after class ends one day, and even though I promptly stop it, just that one little kiss sends me reeling! He's my student, and yet all I want to do is stare at him... Into those beautiful eyes... Which will win; a student's lust or a teacher's logic?
Entrance examinee Takafumi Tsuru, who's secretly in love with his cram school lecturer Yuuki Senpa, accidentally learns Senpa's "secret." Senpa, who's seen through Tsuru's feelings, offers to be "pretend lovers" in place of hush money. While Tsuru knowns Senpa isn't serious about him, he can't deny his feelings and accepts the offer.
The cool, attractive chemistry teacher Kuroki reaches out to the timid, lonely Tomoya. He forces his man-heat into Tomoya's sensitive body at school and on the train they commute by together; forcing Tomoya to drown in lustful pleasure. Pleasure and shame turns into attraction, and Tomoya begins to bloom. As his lonely heart trembles at this unpredictable love, the always kind Sakisaka sweetly approaches him... The men's ecstatic love hungers for Tomoya's affection.
Nakajima Rito loved his sensei, Sawaki Eiki. But he didn't know that the feeling was mutual. On the other hand, his physics sensei, Fujimori, kept coming between them. Fujimori liked Sawaki and used Sawaki's feeling for Nakajima to threaten Sawaki to sleep with him. Would our lovebirds be able to fend off Fujimori's attack?