Oshiego ni Kyouhaku Sareru no wa Hanzai desu ka?

Tenjin is a 27-year-old teacher at a cram school helping students prepare for middle and high school entrance exams. Though skilled with elementary students, he has no affection for children and approaches his work with indifference, enduring the job while mentoring a colleague and dealing with life's hardships. During a class, a fifth grader unexpectedly hugs him and says she loves him. A 14-year-old student named Seika witnesses the moment and uses it to coerce him into providing private lessons at night.