Saki is curious as to where the other students got their fancy lunches. When she gets the answer, she directly marches towards the source only to find out that the only way to get the lunch is to... satisfy Sensei's sexual needs. Reluctantly, she agrees and experiences sex so pleasurable that it remained etched into her mind. Soon, she starts to help out Sensei with his "needs" every day which begs the question... is she here for the lunch or the sex?