Abiru Junjou by Ougi Yuzuha

Summary

Plot: First-year high school student Yuka happens to see his amazingly handsome neighbor kissing another man. However, he learns that the handsome neighbor is his math teacher. Having fallen in love at first sight, Yuka struggles to attract Gotou’s attention, but Gotou restrains him with an, “I have no interest in kids.” Also contains a oneshot called Kabuki machi no Otoko (The Man from Kabuki City). Related:Star na Koi(Side Story)