This isn't convenient censoring, she has panties on.

What's there to censor? and I thought we're discussing the saya-hirano issue in this scene.

It's a dream/nightmare bubble.

And why the censor circle had Three Kouta Hiranos on it?

general_tiu said:
And why the censor circle had Three Kouta Hiranos on it?

it was a dream she was having, of three Kohta calling her name. I'm not too sure if this was a censor purpose, as i remember this scene was in the manga.