A schoolboy is killed by bullies who manage to Make It Look Like an Accident. His mother becomes a school nurse under a new identity to kill all of them.
- The nurse in the unabridged version knows everything.
http://tvtropes.org/pmwiki/pmwiki.php/Laconic/MariaNoDanzai
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A schoolboy is killed by bullies who manage to Make It Look Like an Accident. His mother becomes a school nurse under a new identity to kill all of them.