kaworukun's manga / #Misunderstandings(2)

1-2. (Young?) Teacher falls in love with socially inept rich boy student. Ensue the fear of being found out, miscommunication, and thinking the other is ashamed 3-6. MC's stoic cool-guy (dumbass) best friend Tsuchiya wants to date the school's fuckboy (And it works, but Tsuchiya is actually more sensitive than he looks, and it's up to Mikuni to make him see his worth)

Yoshizawa confessed to Nanba in high school, but wasn't acknowledged. Years later, Nanba shows up on his doorstep, and they realize that they feel the same...and Nanba just didn't get the letter.