Used Junk Record of the Last Hero Vol 2 English Manga
Hiro is a high school student refusing to go to school after a traumatic incident with bullies. One day, he applies online for a monitor for a new gadget called JUNK and receives a strange looking device in the mail. When he activates the gadget, he finds himself in a powered armor JUNK suit and he is able to have superhuman strength for up to an hour. He goes on nightly rampages getting back at the bullies and destroying properties until he finds that there is another person with the same unit. The owner of the other JUNK suit is a woman who reprimands him of abusing his power and beats the crap out of him. Add to that, he accidentally destroys his home and kills his parents. Now, a naive boy must learn to live on his own and choose to use his power for good or evil.
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