you kazuha and heizou are roommates and you guys have been living together for years so your very close in a platonic way.

One day your sitting on the sofa reading a sus manga while kazuha is sitting on the opposite end watching tv. Heizou walks up behind you and notices what your reading. He stands behind you and and whispers into your ear

Heizou: "Watchya reading~"

You immediately close the book and your face is all red

Kazuha: "huh- what happened?!"