Happy Course OVA

Chitose Nisui is an ordinary middle school student. His parents died when he was young. He grew up in an orphanage and lived in a single-family house left to him by his parents, leading a lonely and peaceful life. However, due to the arrival of five beautiful female teachers, his life has never been as peaceful as before. The five female teachers have different personalities and have many strange hobbies. Of course, conflicts are inevitable and the family is disturbed by the five teachers. In order to compete for the position of Chitose's mother, the five teachers tried every means... Finally, Chitose couldn't stand the endless "family games" and drove away the five teachers. His life returned to its former peace. But in the days when there were no teachers "making nonsense", Chitose always felt as if something was missing. Later, Chitose found that he was really afraid of losing them. Finally, he said to the five female teachers: "I don't want to carry five identical keys...from now on...please take care of me..."