Katei Kyoushi x Saimin ~Zettai Juujun, Wagamama JK to Haiso Tsuma o Saimin Sousa by Poison jap

The main character “Ryusuke Otomo” begins part-time work as a tutor with the introduction of his father.
However, Satoshi Ichinose, an actual student, ridiculed that Ryusuke was an F-run student,
His mother, Sakiko Ichinose, did not seem to favor him.