Goodbye Lilac
グッドバイライラック
Kasai, a high school teacher, has a student named Katou Reiji who is both a hassle and endearing. After Katou confesses his feelings, Kasai maintains appropriate boundaries. As spring ends, Kasai sees Katou off at graduation. Several years later, Katou becomes a teacher and coincidentally ends up working at the same school as Kasai. The story includes an additional chapter.