Misao no Keiyaku

Murakami, a lackluster university professor who is despised by his wife and disrespected by his students. The only thing that kept him going was the presence of Yoshino Misao, a student who treated him kindly. However, when his wife's affair was exposed, Murakami finally plunged into despair. Until he was comforted by Misao's gentle embrace…

(Source: Young Jump, translated)