Kimi to Warui Koto ga Shitai

At her school, Mamori Wataya has always gone unnoticed. Tall and plain, she quite a while in the past acknowledged her job as a side person. A new path opens up for her when she makes friends with her brusque classmate Soushi Fuji, who uses a cane to walk and doesn't care if people underestimate him. Might Fuji at any point help her to embrace her terrible side and become a lowlife like him? She experiences her first taste of the high that comes from breaking the rules when Fuji asks Wataya to drain the school pool on his behalf. She is willing to try being a little naughty, just like the villains in anime and manga that Wataya admires. However she may not be prepared for exceptional wrongdoings, Wataya realizes she needs to begin doing awful things.