Please consider the sentence highlighted in bold (other text is given for context):
俺、さっきまでゲームして寝てたはずで、親丸がかえの高校生だったんだぞ。
I know that 親丸 means "parents circle" and 高校生だったんだぞ means "was a high school student", but how does がかえ transition or connect this sentence together? が かえ can be inferred as "went" but I don't understand how this is actually connecting.