 If you liked
Utsuro no Hako to Zero no Maria
|
 ...then you might like
Murasakiiro no Qualia
|
Most obviously, both feature a protagonist who experience phenomena that superficially resembles a recursion of time, or time-loop, from the perspective of that character. In both, the protagonist face and utilize supernatural phenomena that is ultimately the result of the deuteragonist's ability. Both depict the protagonist losing their humanity (either literally or figuratively) and sanity for the sake of said deuteragonist.