Chuuya I'm Dying

[This fanfic was originally posted on AO3 by SimplyLavender99 as well as Quotev. Per their request, I will be posting their story on this site.]
UA High has been attacked one too many times. As such, Principal Nezu figured it was time to call in a favor... Next thing you know, Dazai and Chuuya are sent on a mission to babysit *ahem* BODYGUARD some high schoolers known as 1A. Although 1A has some serious doubts, the villains soon learn not to underestimate Soukoku, but not before getting their asses kicked.
In the process, Dazai tries to kill himself and gets a little to close to succeeding for Chuuya's comfort.

Or:

Dazai and Chuuya get sent to UA as students to bodyguard class 1A. They cause a lot of chaos in the process and have fun messing around with the heroes ideologies. However Dazai gets even more depressed and almost succeeds in dying.