great manga, i thought there will be america actor arc but it seem to be cutted/thrown, to bad it dont go longer -_-, thats the only bad thing about this manga
it just my theory, did the girl actually hate her personality that they split apart (self-loathing)? so if the mc accept all her personality they will combine into one again since he accept her whatever they are
I'll be honest here, this is strange grief copy(i dont know which come first) with the mc wear a mask similar to tsukimichi (mc is op but cursed to be ugly, which why he wear a mask) the difference between the strang grief is the mc is not that useless and the mc party not too overpowered...