Boku no Meikko wa Yandere deshita

Boku no Meikko wa Yandere deshita Summary:

The first time meeting my nieces
All of them are cute children, but only her……!?
The protagonist was made to look after his nieces for about a week because of his sisters’ trip to Tokyo.
His life will be swayed even more by 5 young girls, including the niece who acts like a newly-married girl