Kimi to Warui Koto ga Shitai

Mamori Wataya is a tall high school girl with a gloomy, unremarkable appearance and a shady vibe. One day, she crosses paths with Kanashi Fuji—a small, frail boy with a sinister grin. He’s the kind of background character nobody notices and the kind of troublemaker nobody likes. When these two meet, their dull, colorless lives suddenly take on a new shade of blue.