Nemureru Tsuki, ≠ Recommendations
Both manga deal with our MC's sudden and ofc, very shocking ability to time travel (which is very conveniently never elaborated on). The MC ends up falling for his relative, and both manga have no qualms exploring incestuous relationships in detail.
when I read not equal, I was immediately reminded of this manga!! both deal with time-travel, and both have, um...incestuous relationships :')