Don't Say No, Kei

Overview

High school teacher Kei has never been in a relationship his entire life. Toma, his next-door neighbor and student, is like family to him, but they've grown distant over the years, much to Kei's secret disappointment. One day, Toma accidentally learns that Kei is actually interested in guys. All of a sudden, Toma's aloof attitude takes a 180 as he starts to put the moves on Kei... Toma even confesses that he's always been in love with him! There's no stopping Toma's advances! This is a naughty and heart-pounding romance between a handsome high school student living next door and a teacher who's a beginner in love! (Source: Renta!) Note: Includes one extra chapter.

Source: AniList