Whatever, congrats!Pervert!Kouhai...Also high school Mafuyu-sensei...In contrast to her strict personality, she's really honest and cute. Add her clumsiness and she has a good balance.But to add to her the kouhai attribute in the special chapter...No other way to display past nee-sama's superhuman cuteness.The icing on the cake!I want to change back into a tracksuit...