If you're looking for manga similar to Sensei to Naisho, you might like these titles.
After arriving in Tokyo to live with her uncle, Suzume collapses in a nearby park when she remembers once seeing a shooting star during the day. A handsome stranger brings her to her new home and tells her they’ll meet again. Suzume starts her first day at her new high school sitting next to a boy who blushes furiously at her touch. And her homeroom teacher is none other than the handsome stranger!
Takumi has been in love with his brother's best friend since he caught Jun stealing a kiss from his brother. Now that Takumi's all grown up, he's prepared to win Jun at any cost!
Misuzu is not only a new teacher at her school, but she’s also dating its principal, Kazuki. However, Misuzu soon finds herself in over her head when Kazuki’s little brother Masahiro finds out about their relationship and takes out his feelings on Misuzu’s body. Now stuck between the guy she likes and a forbidden relationship with another, what’s a girl to do?
Morinaga Sara, 16 years old, is a cool, yet calm girl... But in reality, she has this incredibly ugly smile. Because of the trauma she experienced, she became expressionless. However, the source of her trauma, the twins, who apparently became really good-looking, suddenly appears right in front of her!
Because of her beauty and status as a school idol, Akami is somewhat forced to take part in a school play. Only problem Akami has is that, the role she's suppose to do is a ''male'' role and she isn't experienced in acting at ALL.
High school teacher, Ayai Tsurugi feels uncomfortable around one of his students, Endou Kanaga. One day, after school, the two of them end up getting trapped in the teacher's lounge, and Ayai realizes that his feelings for her is "love"...!?
High school girl Mia's dreams of perfect attendance are thrown in to jeopardy when she encounters Katakoka-sensei, her new teacher, kissing someone in the hallway of her school. Then, she catches him again later, kissing another teacher in her classroom! What is up with this crazy teacher! To make things worse, he turns out to be her new next-door neighbor as well! Mia can't escape him, and even a possible romance with her classmate Hayama-kun can't distract Mia from the problem of Kataoka-sensei.
Yayoi doesn't have a lover. But then, the art club teacher, Tamura-sensei, stole the sketch she drew named "The Girl"...