Starry Sky - 1x15 - Season 1, Episode 15- Followmy.tv

It begins in the past when Naoshi, the "Leo", first becomes a teacher in the academy whose hopeful wish is to have his students know the excitement and enjoyment of their school lives. After a year of being in the academy, Naoshi has become quite popular and is loved by all his students who even tease and sometimes prank him though Iku questions his closeness and relationship with the latter. The students then begin to prepare for an upcoming cultural festival.