Anata no Iinari

Junichi Minami is a straight-A student with an impeccable record in Akemi's eyes, until she catches him partying in the city late at night. She tells him to stop, and he replies with a seductive "...Sure, Ms. Matsunaga. Your wish is my command." She knows that, as a teacher, she shouldn't succumb to the temptation, but as she'd harbored strong feelings for him for the longest time, she surrenders to her own desires. "I knew it... you're so sensual." Junichi gives her a night of ecstasy so mind-blowing that she forgets her responsibilities as a teacher... A taboo love story... about a student and a teacher.

(Source: Renta!)