Kao to Koe no Ii Senpai ni Kawaretemasu.

Michika is drawn to voices and easily influenced by them. A student council president, aware of this, uses his smooth and cruel speaking style to manipulate her. He convinces her to pretend to be his girlfriend, knowing she can't refuse him. Despite his self-centered nature, she finds it hard to say no. The story involves playful interactions and psychological tactics.