Enji no Hogosha ni Dakarete Shimaimashita summary:

Sayaka, a kindergarten teacher, has to start doing adult work to cover the moving expenses after her boyfriend left her.  However, her very first customer as a call girl is none other than the parent of one of her student...?!  Andou-san raises his son on his own and takes him to school every day. Such a kind man, he tells Sayaka take her pay and go home without doing anything. Sayaka refuses, and now Andou-san is going to 'touch her until the time is up'.