Satou-kun is Peeping. ~I am Peeping in the Girl's Hearts With God's App~ ; Satou-kun wa Nozoteiru. ~Kami-sama Appli de Onnanoko no Kokoro o Nozoitara Do XX datta~ ; 佐藤くんは覗ている。;～神様アプリで女の子のココロをノゾいたらど××だった～
A high-school boy, while sleeping in school, saw a dream in which a girl proposes to him, and then a goddess pops out and grants him something special. The girl from her dream happens to be his classmate sharing the same family name - "Suzuki". After that, he finds out that he got a special app on his mobile which lets him see other girl thoughts!?
Satou-kun is Peeping(Prequel) it is advised to read it prequel for better understanding of the app