Sensei, Ore no Koto Suki ni Natte yo.

Haruto, a high school senior, was secretly in love with his tutor, Chigaya-sensei. He mustered all of his courage and confessed, only to be rejected. To make matters worse, Chigaya quit tutoring soon after. Haruto buried the bitter memory deep in his heart but remembered one thing Chigaya said: "I like stylish people." Using that as motivation, he got a makeover for his big college debut. But on campus, he unexpectedly runs into Chigaya again! As Haruto spends more time with the man he used to think was flawless, he discovers Chigaya's unexpectedly clumsy and adorable side. He knows this love can't come true, and yet...! "Sensei, you're so unfair! The more I see you, the more I want to know everything about you..."

(Source: Futabasha, translated)

Note: Includes one extra chapter.