Itoko no Onee-chan ni Amaechau?

The following content is intended for mature audiences and may contain sexual themes, gore, violence and/or strong language. Discretion is advised.
***A heart-pounding new life together with my “big sis cousin”!?***Masato Ooizumi just entered high school and he finds himself staying with a relative. Living there is his “big sister cousin” who's being way too close with him!?A slightly naughty, living together romcom begins under one roof!!