Basics in Rhythmic Revolution [UNDER REWRITE]

A mourning parent with nothing left to lose seeks to enact vengeful justice on the school that was responsible for his son's death.
Luckily, he just acquired the means to do so.

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Benjamin thought this was supposed to be an easy mission. Teach groups of annoying brats a school subject while undercover investigating which teacher killed some random kid. Quite simple really; just take down a psycho bookworm and get paid. 𝕎𝕙𝕒𝕥'𝕤 𝕥𝕙𝕖 𝕨𝕠𝕣𝕤𝕥 𝕥𝕙𝕒𝕥 𝕔𝕠𝕦𝕝𝕕 𝕙𝕒𝕡𝕡𝕖𝕟?

'Wait...Why are the teachers so strong?'
'And who the hell is Δlice and why does she have her own room inside the school?'
'𝙒𝙃𝘼𝙏 𝘿𝙊 𝙔𝙊𝙐 𝙈𝙀𝘼𝙉 𝙎𝙃𝙀'𝙎 𝘼 𝘿𝙀𝙈𝙊𝙉!?'

Or basically, what if the assassins from Rhythmic Revolution were hired to bring down Miss Grace and her posse of murderous teachers. Complications arise when unexpected bonds are formed, making a certain dark hearted imposter reluctant to finish the job. Love hurts, but getting your skull smashed in by the school's resident hellspawn tends to hurt even more.

Crossposted on AO3, I'm more active there, gets updates first.
Cover not by me.