Initially, I had a programmed, American response to the premise of cousins being love interests. However, after reading up on the cultural differences, I thought it could make for an interesting plot dynamic. There are plenty of shoujo manga where a cousin comes on the scene to stir up trouble, but I have little experience with such a romance being the primary focus. All that just to say that if the cousin thing doesn't weird you out, never fear, because the characters are plenty weird enough to jack up the story on their own!
I dropped this series after 8 chapters, and even that was a stretch for me. The "unassuming" male cousin intentionally conceals his physical, mental, and social capabilities from his female cousin in order to stay close to her. His long-unrequited love goes unnoticed by the main girl...for about 2 seconds into the story. Suddenly, something breaks inside Male Cousin's brain. Hormones go crazy. What begins as a relatively innocent kiss in one scene progresses to full-on molestation a few pages later...on multiple occasions! Female Cousin continuously says "stop, stop!" but to no avail. Male Cousin just can't stop himself anymore. (What the heck is this series trying to promote?! Rape culture?! Shoujo can get so disgusting.) Female Cousin, rather than being repulsed by Male Cousin's obvious disregard for her actual feelings, begins to become flustered and steadily attracted to her heretofore useless relative. He pressures her into dating him, and their grossly masochistic interactions continue.
So maybe that's your thing, but it sure isn't mine. *drops the mic, drops the series*
