Responses
No, he wasn't disowned by his parents. He met the cop during his delinquent period and the cop took an interest in him and became a mentor, not an adoptive parent. You don't have to be disowned by your parents to have another adult take an interest in your well-being.
No maybe. It is canon. Scroll to the first paragraph at the bottom of the page for the end to all of this speculation:
http://www.mangago.zone/read-manga/finder_character_book/uu/finder_character_book-chapter-1/5/
i wonder how aki was in high school?was he a wannabe delinquent? I imagine sometimes the story going like aki, first year high school student in an all boys high school with asami as the dean. heh heh naughty studentxprinciple relationship ugh sensei when will the next chapter come out ╥﹏╥