Before You Fall in Love(2015)

Koi ni Naru Mae ni

Mr. Mamiya teaches at an all-boys school, and he has a secret. The first time that he had a class as a homeroom teacher, one of his students had professed his love for him. Three years later, Haruma Seta appears in front of him. He's matured, he's become a trainee teacher, and he continues to tell Mr. Mamiya that he loves him. Will Mr. Mamiya be able to resist Haruma's approaches...?

(Source: Renta!)

1-2, 6. Koi ni Naru Mae ni (恋になるまえに, Before You Fall in Love)
3-4. Naisho no Heart (内緒のハート, Secret Heart)
5. Usotsuki Lens (嘘つきレンズ, A Lying Lens)