Synopsis

Chiaki left his phone at school, so he goes back that eveningto retrieve it. While he's there, he hears soft moaning coming from anearby room and decides to take a look, only to find Mr. Chiba, themath teacher, taking it from another man... Despite being geeky, allthe girls love Mr. Chiba, who in turn constantly nags Chiaki aboutgetting more tutoring. Although hesitant, Chiaki takes this chance toblackmail Mr. Chiba and snaps a picture of the two men in action. Thenext day, Chiaki shows Mr. Chiba the photo during his tutoring sessionafter school. Instead of freaking out, Mr. Chiba simply smiles andkneels down, then takes Chiaki in his mouth to "bribe" him! This isthe start of extra-curricular lessons between a cocky fool and atwo-faced teacher!