Boku no Kanojo Sensei - Tomos 01-03 (#001-#016)...

The story follows Makoto Saigi , a high school student who has harbored a deep-seated distrust of teachers since a childhood trauma where his kindergarten teacher broke a "promise" to marry him. This cynicism is challenged when the school's most popular and beautiful English teacher, Maka Fujiki , suddenly confesses her love to him after school. She vows to pursue him until he reciprocates, initiating a series of "after-school guidance" sessions designed to make him fall in love with her. Volume 1: The Confession and "Education" Begins Chapters #001–#005:

Maka uses her position to call Makoto to the English material preparation room for "special lessons" that involve intense skinship and boundary-pushing interactions.

Makoto begins to realize that Maka's feelings are genuine, though he remains wary of the "forbidden" nature of a student-teacher relationship.

It is revealed that they live in the same apartment building, leading to more private encounters outside of school hours.

Maka Fujiki's sudden confession shocks Makoto, who initially views it as another teacher's "trick".