Goodbye Lilacグッドバイライラック

From Hoshikuzuu Scans To high school teacher Kasai, Kato Reiji is a troublesome, yet cute student. Despite being confessed to by Kato, Kasai does not overstep student-teacher boundaries. Spring goes by and he sees Kato off at graduation. A few years have passed and Kato is now a teacher himself. And he happens to come to the school that Kasai works at...