Shiretto Sugee Koto Itteru Gal. - Shiritsu Paranomaru Koukou no Nichijou - Vol. 3 Ch. 27.5 - Volume 3 Extras

[doujinshi_master]

Dang Venom really reminds me of Cinnabar from The land of lustrous

did someone mentioned peak???

 

[StrideInTheRain]

This is super late (just rereading) but for Heeko's brother's line:

It is your duty to disturb this world's balance.

The original was バランスを取る so it should be something like maintaining this world's balance.