Slowly losing your friends over the years drives you to look for a connection on the internet. This leads you to a connection that changes your life for good.
Izuku Midoriya got involved in a villain incident causing him to lose his mother. A certain underground hero who got involved in the investigation grew fond of the child and decided to be his foster parent for a little while. But soon enough an even more interesting connection was found as Izuku manifested his quirk.