NSFS-147 Hire a black English tutor for your wife to learn English and the ending

Ichika, a new female teacher, is nervous at her first school. Perhaps thinking of such a situation, the principal introduced Danny and Rick, who are good English teachers, to take care of him. One day after school, Danny starts helping Ichika, who is cleaning the classroom for the truant students. But what is Danny's real purpose?
Great related Japanese movie:

•  Sister-in-law's amazing breasts
•  My wonderful stepmother
•  Let me help you satisfy