Tsumura plays a young tutor who teaches at home to a lazy boy who doesn't study well according to his parents' needs. However, no one is perfect. If you win this, you will lose that, so even though she is a very good tutor, she has a weakness: sex addiction. This is understandable because she divorced her husband a long time ago, and at her age, not being able to have sex feels very uncomfortable. The other guy was no less, he was weak at studying and often played around promiscuously, so when he had only studied for a few minutes and the tutor had sexual intentions, he just calmly enjoyed it and responded. The boy was truly lucky to be both imparted academic knowledge and to be imparted knowledge about sex from his teacher.