Tag: Protagonist's Cousin as a Heroine
One or more of the heroines is a cousin of the protagonist.
A cousin is a relative with whom a person shares one or more common ancestors (other than a parent, child/descendant, sibling, child/descendant of a sibling, or sibling of a parent/ancestor). However in common parlance, "cousin" normally specifically means "first cousin".
Protagonist's Itoko as a Heroine