>both of The younger sister wishes the unhappiness of her older sister
>Glass Mask didn't have affair involved. The younger sister married the lover of her older sister.
>Evil younger sister
>Both of the sisters aimed the same guy
>Both have revenge plot but Doka Watashi Yori Duko de Ite Kudasai's revenge arc is slower compared to Glass Mask
>Glass Mask has better revenge
>Glass Mask didn't have affair involved. The younger sister married the lover of her older sister.
>Evil younger sister
>Both of the sisters aimed the same guy
>Both have revenge plot but Doka Watashi Yori Duko de Ite Kudasai's revenge arc is slower compared to Glass Mask
>Glass Mask has better revenge
