Aho-Girl: A Clueless Girl Vol. 5 (manga)

Yoshiko’s no fool. Wait, no. That’s exactly what she is. After her latest preternaturally dismal performance on their midterm exams, the long-suffering Akkun takes it upon himself to investigate training options for the wayward girl. After all, dogs can be trained—and surely Yoshiko is smarter than a dog. Surely.