Ongoing I'll Be Spoiled by My Big Sis Cousin?; いとこのお姉ちゃんに甘えちゃう?

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!!
(Source: Ultra Jump)

List of Chapters