Boku no Kokoro no Yabai Yatsu

From Seven Seas:
Kyotaro Ichikawa, a boy barely clinging to the bottom rung of his school’s social ladder, secretly believes he’s the tortured lead in some psychological thriller. He spends his days dreaming up ways to disrupt his classmates’ peaceful lives and pining after Anna Yamada, the class idol. But Kyotaro’s not nearly the troubled teen he pretends to be and it turns out Anna’s a bit odd herself.

Note: Nominated for the 2020 Manga Taisho Award. Won the 2020 Tsugi ni Kuru Manga award in the Web Manga category and the Grand Prize at 2021 Tsutaya Comic Awards.